Quote:
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Originally Posted by cheefrawker
Well I was lookin' for an engine to swap and already had my mind set on the GSR. But I just found a B18B for 700$ with all the part needed for the swap (minus the tranny). I just had a couple questions.
1. It has lower compression than the GSR and this naturally makes it better for Turbos. Is the B18B considered the best Honda Engine to turbo?
2. Also I noticed that alot of the V-Tec engines have 10.6:1 (GSR) or higher for compression. Is this because of the V-Tec? I read somewhere that V-Tec was invented to negate the need for a turbo so this would explain it but is it true?
3. I know that you can later swap out the head for a Vtec. If question 2 is true than adding the head would highten the compression and make turbos less effective right?
So basically what I'm asking is what produce more HP when turboed and the internals completely done, (pistons, cams, port and polishin etc..)
LS
or
LS/Vtec
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1. No even with its lower comp it still makes less power with just as much or a few psi more then a GSR. 10psi on LS nets 200-240 on a gsr 230-300 thats WHP. Best motor to turbo would be the one you can afford to build up but if we can add the K to the mix it would be that. Honestly best for a turbo I say the GSR.
2. Higher comp = more power its that simple the boost doesn't like high comp is a dumbed down explantion of why alot of PSI and high comp don't get along. Its all in the fuels and if your going to be running 93 its smarter to run 20 PSI @ 9.5:1 then 5PSI @ 11.0:1 comp. Race cars run 13+ comp and have 30+psi yet they run crazy fuels we dont get at Shell.
3. lsvtec turbo is great my friend who I copied his bottom end is running a lsvtec turbo and likes it better then his older gsr turbo setup. key with lsvtec is the builder and parts used. aside from the comp ratio and vtec the GSR ITR B16 head just flow better.
LS swaps are great go for it also aim for a b16 *y21* tranny or ITR one you'll be tearing b16s up like cake.