Thread: tri -y headers

It is kind of unfair considering BTCC had rules and regulations and Jamie and drag racing or street racing do not have rules. To compare them directly is sad.

But, yes they dyno'd these BTCC engines at 310 BRAKE HORSEPOWER. At 88mm x 82mm in fact. And, YES, with a weaker 4-2-1 header at 8500 RPM they were make that 310 bhp.

That seems a bit flipping crazy to me, even for the 92mm x 92mm builds. Speaks leagues of the amount of custom work and engineering that went into those BTCC engines made in the late 90's.

Respect. http://www.marklamond.co.uk/misc/scans/CCC_1999_Feb_Touring_Car_Engines.pdf

Why is the BTCC engine even mentioned in any of these threads?

Your talking a dry sumped race engine designed by a team of engineers vs. engines pieced together by average working folks. The ports,cam profile,header design,oiling system etc can't be compared to anything we are doing to today's standards. The intake, cam and header were made to reach a ceiling HP and a class limited RPM.

300bhp is not record breaking by any means with that type of restriction. Pretty sure 340+ would be easy. Hell even Charles made 215whp with a simple 54C build using a single throttle and a 86mm bore. There's too much bandwagon jumping and not enough reading and understanding whats going on these days.

Just crazy to me to see all this b.s over headers when that's the smallest choke point of the VE lol
On a stock intake manifold VE with N1 cams (90% of this forum) there is no noticeable mid-range gain with a proper 4-2-1 over an equal 4-1. It all comes into play from 6900-9000+ RPM.

the one that's currently bolted to it considering it was designed for the engine? or did you think that was a 4-1?

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@Kyle has posted the info you need, and yeah it well outclassed/outclasses any 2L off this forum, not suprisingly either, as jamie said it was modified abd built by proper motorsports engine builders, and I've not seen many 2.4 itb'd dyno's but with 20% more displacement its not really a fair comparison



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Give us that funding. 300hp is is like a stock DE, SMH

last time i checked they rated those BTCC engines at the flywheel. so 300bhp= around 265whp. with that being the case we have already seen 2.0ve with that hp with no were near the same money into it as a btcc engine.

I wonder if someone could do a DE 2.0L build that was similar...... hmmmmmmmmmmmmm

never mind what? if you have a point to make put it out there

afaic the btcc 2L engine is the ultimate standard, a 2L revving to 8500rpm, and making 150bhp/litre. I wouldn't mind a link to something similar?

I know some guys like to believe the 4-1 superiority (where it can give a better peak at the expense of midrange) but the reality is that 8500rpm and up is where they start to come into their own, not 6000rpm and up. the tri-y is what was used on the p10 touring cars, and the p11 touring cars, the p11-144 touring cars and the nme rally n15's, all using itb's in an motorsports arena, you seeing a pattern yet?

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