Even on rotrex website it recommends the 8 rib belt for the c38 as it will slip at higher boost levels causing torque spikes? sounds to me like this along with the other issues you're having could be a factor!

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Super high boost Completed, destroyer of gearboxes and 160mph club

Wayne's number is 07874328306. If you drop him a text first, then ring, he will likely pick up. I've been on to him this morning, twice already.

JP

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HDI Engine Tuning / Remapping Services - https://www.facebook.com/dervtech

306 GTi-6 Track Car - 200+ hp all N/A!
306 DTurbo Track beasty - 209.9hp - RIP

I really don't think the charger will appreciate running without a dump valve, the pressure build up when you release the throttle at high revs is very likely to damage it.
Was your exhaust cam advanced or retarded ?

Wayne's the man, I remember on my engine he was on about adding more fuel to keep exhaust valves cool?? Something like that, I forget!

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www.bridgecraftmotorsport.co.uk

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Martin,


It needs an 8 rib drive - I'm aware of the lack of availability of the 8 rib belts. The 8 rib belt was the first thing I bought - I then designed the rest of the system around it.

What crankshaft pulley are you using? Are you using the 8 rib one from my kit? You need to use this - it's a larger OD the the standard pulley, and has been sized to give the C38 the correct input shaft speed with an 80mm pulley. If you are using a 6 rib pulley (standard dia), this could explain the boost issue.

You do need a DV, re-circulating not atmospheric.

Cams need to be standard, in the standard timing position. Wayne will adjust cam timing on the dyno to optimise output.

What size restrictor are you using?

What injectors, fuel pump, and fuel pressure reg are you using?

It shouldn't be mapped of throttle angle (alpha-n mapping), it needs to be mapped with engine load being measured via a pressure sensor.

13:1 is too lean at 8,000 RPM - it would be better in the 11's somehwere - this will also help with your cooling and reduce EGTs.


Regards,
Rich

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Contact Details:

rich@lynxpowerengineering.co.uk
07732 822546

:-) good info

SHB ??

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French military victories?
Did you mean French military defeats?

Car is booked in with Wayne next week !!!!!!

I have check compression on it before and all were ok but will change the cams out to the standard ones before i get it re mapped.


Rich
8 Rib belt is now fitted with your bottom pulley just had to swap one of the idler pulleys for a smaller one to get a belt to fit so that's sorted now.

660 Injectors with 044 fuel filter fitted

New DV on order and will be fitted

Thanks for all the help on here and fingers crossed it all works out next week with Wayne.

Marty

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206 Rallycross GTI6 SC SHB 425 BHP clutch eater !!!

Looking forward to getting some decent power out of it and then testing it on the22nd as it should be rapid
Will keep you all updated and thanks for the help guys


Marty🚗🚗🚗

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206 Rallycross GTI6 SC SHB 425 BHP clutch eater !!!

Got the car mapped but it turned out I have the 90 mm pulley on the charger so got 300 hp out of the car and took it for testing at Lydden and it ripped out the top engine mount so have redesigned this to stop it happening again now fitted the 80mm pulley and changed the cams as it had PT81 fitted so that would lower the boost rate
Yesterday it started making a rattle noise like the bottom end so pulled the engine out and found the flywheel has come loose which is strange as I stud locked and torqued the bolts up correctly as normally I just stud lock and windy gun them up so back to standard flywheel with new bolts and box it up this week then off back to Wayne's the following week to get mapped ready for the first race on the 29th march but with 300 bhp it was mental so 400 + will be crazy and should get my 0-60 down below 4 seconds with the Avon's 👍👍👍👍

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206 Rallycross GTI6 SC SHB 425 BHP clutch eater !!!

Can not explain the grip you get with super soft Avon's warmed up on a start as some of the supercars are sub 2 seconds with 4 wheel drive and they have 550 bhp with 1250kg so would think 450 bhp in a 800 kg car would pull 4 seconds if I can get the grip but the car will spin in 1/2/3 with kuhmo tyres and then put on the Avon's and it will spin in 1st until it hooks up then it just goes 🚗🚗🚗🚗🚗

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206 Rallycross GTI6 SC SHB 425 BHP clutch eater !!!

You will need a new gearbox in no time if you manage to get grip and give it the beans in 3rd then you will be part of the ever growing gearbox killer group lol

Hi Allanallen

Using RX slick avons there sticky as s**t !!!!

Marty

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206 Rallycross GTI6 SC SHB 425 BHP clutch eater !!!