by Tony Smith » Sat Jan 17, 2015 6:55 pm
Actually thinking about it that 324 figure was probably just an error because you would be disappointed to get 76bhp from an additional 19 psi of boost. My comments have never been about dissing you or your work , I think the stuff you do looks fantastic and has obviously been researched and tested extensively beforehand. I do think the rollers you use probably read a bit higher than most RRs but I know that's not why you use them. Be good to see how quick the cars are , love to see some GTAs shocking some more exotic machinery. Would much rather do a Santa Pod day than going on the rollers, having burnt holes in 2 exhaust manifolds setting up over the years, sort of puts me off. A 400bhp GTA should run high 11's low 12,s at about 115 120, which is very fast by any standard. Best time I ever managed was 12.8 at 108 on a hottish day at The Pod a few years back. Runs a bit more boost now and the mapping is better so might make 110. I only set out to achieve 300bhp when I started my GTA in 1990 (gulp), but was always trying to do this with bolt on mods. Found I couldn't do it with the 2.5 with what little info and equipment was about then and when a Safrane biturbo engine came up at a reasonable price I bit the bullet and had it converted to fit. Chargecooler carried over from before, bought a very high quality turbocharger (which could have probably been a little smaller with hindsight) and then the worst decision of the build - fitting aftermarket management. Really wish I'd found someone to remap the A610 ECU , be a nicer car to use everyday and probably only made 10-20bhp less. But too much money and grief to change now. Haven't had it on the rollers since it was running 0.7 bar where it made 280 bhp. Pretty confident the extra 0.5 bar will have taken it past 300bhp. If I get asked how much bhp shes got mister, I say about 310-320 which I think is a fair estimate.
Good luck with future developments. Be good to see some of it marketed by Lee as phased upgrades.
Alpines - GTA 3.0 Turbo, GTA 3.0 Inj (Project DD), GTA 6.2 V8 (500 bhp) , R32 Skyline GTR, BMW Alpina B10 635 Highline, Alpina B10 E39 5 Series, Jaguar 4.2 XKR, Laguna 205GT, BMW 120d.