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Author Subject: Engine Rebuild for Low Boost
jamiek_uk2000

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Location: Llanelli

Registered: 18 Apr 2009

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Post #1
I'm looking to go at some point in the future for a LBSC setup, but I am debating rebuilding a spare engine that I have for my car at the moment which I will then boost. My reasoning is that surely, bolting another 100bhp onto a car that has done 100k is going to put some stress on parts that have already done a large portion of their life. I also want to have a car that will be reliable once charged, so not going to be a nightmare to live with. I was wondering whether it was worth doing any work on the head whilst it is off or are they more than happy at LB? I was thinking of just going for the rebuild using standard parts for some and then the following uprated:

Heavy Duty Main & Big End Bearings
Uprated head gasket
Steel head bolts (Would they really be needed)

Am I just being too over the top here, or does what I'm saying make sense? Has anyone else done this while going low boost or is it just the high boost that go this route?

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Posted 9th Apr 2013 at 20:01
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eliotrw

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Post #2
Why not if youre there.
Head Gasket wise anyway.
I had a Rich W one fitted when my head was done.
Bearings are good too.
Depends how are you want to go with it.

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Posted 9th Apr 2013 at 20:13
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davedgti6

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Post #3
I would not bother if your engine is healthy, I low boosted my engine at 133k and then did another 30k on it before I changed the engine to a low boost one, engine ran fine with no issues, boosting does not put that much extra stress on them,

Also there's no point rebuilding a standard engine only to rebuild it again when you decide to go high boost (and you will) my original engine now sits in the corner off the garage and is still in good order Smile

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Posted 9th Apr 2013 at 20:17
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jamiek_uk2000

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Location: Llanelli

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Post #4
Hmmm. Things to consider. I can't really see me going high boost, it just involves far too much cost really. Head gasket is a certain job really, since it's only a few bolts. As I said, is there any head work worth doing?

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205 GTi Red - G939 RTU - Died!
306 GTi 6 Diablo - Being resurrected! Project Thread

Looking for:
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Posted 9th Apr 2013 at 20:19
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eliotrw

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Post #5
The HG and Bolts for high boost are only about 30 quid more than OE
So personally i see no reason not too.

Them at least
Rich sells the whole lot for like 110?

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Posted 9th Apr 2013 at 20:20
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eliotrw

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Post #6
Head work theres not much point
At the end of the day it will cope with double low boost.
Rich had 500hp out of one.

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Posted 9th Apr 2013 at 20:22
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jamiek_uk2000

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Location: Llanelli

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Post #7
Ah right, that could well be an option then. I'm not sure whether I'm going to go to Rich to have it fitted or get the spanners out. Since it's only low boost then it's not hard by the looks of it.

Need to keep my eye on the for sale section!

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205 GTi Red - G939 RTU - Died!
306 GTi 6 Diablo - Being resurrected! Project Thread

Looking for:
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Posted 9th Apr 2013 at 21:38
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daveyboy

aka Jim Davey

Location: Southampton

Registered: 01 Oct 2007

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Post #8
It's the electrics, and mounting hardware for oil and inter coolers that people tend to bodge. Lynx do a nice job of the install and if you haven't the spare time or the facilities then the pay to fit option is attractive.

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R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.

Some of my services: (See my for sale threads)
Engine mount/chassis repair
Solid Beam Mounts BACK IN PRODUCTION
Harness bars
Posted 9th Apr 2013 at 21:41
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eliotrw

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Post #9
I might pay purely because i can get the frontend sprayed while its there

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Posted 9th Apr 2013 at 21:48
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jamiek_uk2000

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Post #10
Yeah, that is a point but I think the fitting was £750 IIRC from the price guide I saw? It's a big old lump of cash and although I know that it will be an awesome job, it's just pushing up the price of the conversion.

Half the thing is that I want to pull the engine out, clean the bay and repaint then fit the engine back in. I wasn't sure what Lynx would be like about doing that. What I could do is pull the engine and paint the bay and then take it in with no engine, ready for them to start work

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205 GTi Red - G939 RTU - Died!
306 GTi 6 Diablo - Being resurrected! Project Thread

Looking for:
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Posted 9th Apr 2013 at 21:49
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daveyboy

aka Jim Davey

Location: Southampton

Registered: 01 Oct 2007

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Post #11
What are they going to work on if its got no engine? They could supercharge the air con iMig I suppose Hmm

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R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.

Some of my services: (See my for sale threads)
Engine mount/chassis repair
Solid Beam Mounts BACK IN PRODUCTION
Harness bars
Posted 9th Apr 2013 at 21:53
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jamiek_uk2000

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Post #12
The aircon has gone! What I was thinking is that they could build the engine out of the car and then drop it in, maybe easier on their end? I'll drop it back in myself but since I know how much of a nightmare it is to work on the belts at the best of times, I would rather work on the engine out of the bay!

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306 GTi 6 Diablo - Being resurrected! Project Thread

Looking for:
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PR1.2 16"
Posted 9th Apr 2013 at 21:57
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eliotrw

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Post #13
Ive saved so much money on bits n pieces the fitting is free nearly.

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Posted 9th Apr 2013 at 22:28
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jamiek_uk2000

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Post #14
You having Lynx do it? I'm determined to get the whole car on a 2nd hand parts basis, apart from the obvious (bushes ect) Some B8's I need...

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306 GTi 6 Diablo - Being resurrected! Project Thread

Looking for:
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Posted 9th Apr 2013 at 22:30
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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

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Post #15
jamiek_uk2000 wrote:
You having Lynx do it? I'm determined to get the whole car on a 2nd hand parts basis, apart from the obvious (bushes ect) Some B8's I need...


Modifying cars (reliably) does not come cheap or second hand I'm afraid. No

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Posted 9th Apr 2013 at 23:16
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jamiek_uk2000

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Post #16
Well not cheap, but cheaper than some. So far I've picked up a set of 406 Brembos with discs and pads for £165, a viper induction for £60, Baker Gear linkages for £40, rear beam mounts for £100, wheels and AD048's for £350, a rebuilt rear beam for (Insert more than I wish to type here) so it's not been TOO bad.

I know that I am going to spend money on the car and I budgeted around £2k for the car before I started work on the engine. The main thing I am happy about is that since the stuff hasn't been purchased new is that if I come to break the car I wouldn't lose to much money on the parts if I re-sell them. I'm also looking at getting a cage, but maybe someone will be breaking a shell with a cage in by the time I get that far and I will transalant everything over

Any key parts (engine wises mainly) that are integral to the cars function will be bought new, I'm not scrimping and buying second hand thermostats LOL.

I think you know more than anyone Stan how much modifying cars can cost?

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205 GTi Red - G939 RTU - Died!
306 GTi 6 Diablo - Being resurrected! Project Thread

Looking for:
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Posted 10th Apr 2013 at 08:05
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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

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Post #17
Indeed I do, that's why I think doing things on a budget really isn't the way forwards. However, if you can do it and it works out in the end then fair play to you mate. Thumbs up

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"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 10th Apr 2013 at 10:05
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blandy

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Post #18
Surely if the engines coming apart then why not upgrade rods and pistons etc?
Posted 10th Apr 2013 at 10:18
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daveyboy

aka Jim Davey

Location: Southampton

Registered: 01 Oct 2007

Posts: 8,648

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Post #19
blandy wrote:
Surely if the engines coming apart then why not upgrade rods and pistons etc?


No need for low boost, and he's trying to keep the costs manageable, those are two pretty good reasons for not chucking a £1,000 down the toilet on rods and pistons.

________________________________________

R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.

Some of my services: (See my for sale threads)
Engine mount/chassis repair
Solid Beam Mounts BACK IN PRODUCTION
Harness bars
Posted 10th Apr 2013 at 10:23
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,838

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Post #20
jamiek_uk2000 wrote:

Heavy Duty Main & Big End Bearings
Uprated head gasket
Steel head bolts


typically this is tuner talk for bend over with the lube whilst we sell some nicely disguised o.e parts.

std pug bearings are very good, std gasket is mls, std bolts are steel.

stick a set of rings in there, stem seals, clean it all, job done.

however do pay attention to wear in the bores, I've seen quite a variation in bore wear from average mileage engines which otherwise ran perfectly fine and even pulled good RR numbers, to be well beyond tolerances to accept standard rings and pistons.

when you think of all this, and how expensive it can get, I'd be tempted to just bolt the kit on and deal with it if/when it gives issue, as has been proven many a time there are several that have done just this without any issues at all.

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Posted 10th Apr 2013 at 10:43
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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

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Post #21
welshpug! wrote:
jamiek_uk2000 wrote:

Heavy Duty Main & Big End Bearings
Uprated head gasket
Steel head bolts


typically this is tuner talk for bend over with the lube whilst we sell some nicely disguised o.e parts.

std pug bearings are very good, std gasket is mls, std bolts are steel.

stick a set of rings in there, stem seals, clean it all, job done.

however do pay attention to wear in the bores, I've seen quite a variation in bore wear from average mileage engines which otherwise ran perfectly fine and even pulled good RR numbers, to be well beyond tolerances to accept standard rings and pistons.

when you think of all this, and how expensive it can get, I'd be tempted to just bolt the kit on and deal with it if/when it gives issue, as has been proven many a time there are several that have done just this without any issues at all.


This is excellent advice in my opinion. Yes

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"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 10th Apr 2013 at 10:47
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adam b

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Location: The Nam

Registered: 24 Jan 2006

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Post #22
Indeed, wait for the bang and deal with it then. You have a spare engine so no worries.

My rallye engine made very good figures, but had terrible bore wear when it was torn apart - HG went between cylinders eventually. Spend your time and energy in getting the kit sorted. Or in fact get the suspension together.

I'd like to point out that your budget is still significantly bigger than mine Laugh my ass off

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Nothing to see here
Posted 10th Apr 2013 at 11:56
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