How bad would this cam be for FI?
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From: Champaign Il
How bad would this cam be for FI? My cars always been NA with a small nitrous shot, but I've been pondering a blower (procharger) or a turbo setup instead of the bottle. I don't want to change cams though, and I know the convertor is too big (4200 stall). How bad are these specs for FI?: 228/236 112 LSA 108 ICL .588/.602 I think its an XE-R grind. I also have MTI stage 2 heads milled .030 if that matters. Perhaps the compression might be too high to even consider FI? Its a stock bottom end too (for now). Thanks for the help!
that's pretty extreme for a blower cam,I'd sell it and go with a stock one and spend the money on a good fuel system, you're probably at 11:1 now, you'll be lucky if you can run 5 lbs max with very conservative timing. Get some different heads like truck heads or stock 243's and that'll be a good starting point. Unless you're planning on changing your engine setup you won't see the nice gains you can get by going forced induction.
tell ya what forced induction is more fun than nitrous cause your power is always there.
tell ya what forced induction is more fun than nitrous cause your power is always there.
Originally Posted by TS6
My cars always been NA with a small nitrous shot, but I've been pondering a blower (procharger) or a turbo setup instead of the bottle. I don't want to change cams though, and I know the convertor is too big (4200 stall). How bad are these specs for FI?: 228/236 112 LSA 108 ICL .588/.602 I think its an XE-R grind. I also have MTI stage 2 heads milled .030 if that matters. Perhaps the compression might be too high to even consider FI? Its a stock bottom end too (for now). Thanks for the help!
School of thought #2, 108-112LS. This is a little hard for most people to swallow. This LS will allow some of your incoming boost to bleed out of the Cylinder. however, you are using a supercharger and are forcing air in. which means you will always be able to bleed off the used air and will always have nice clean cool air for the combustion cycle. The myth that you cannot get a cam with this lobe sep to idle correctly is just that, a myth. If you cant get it to idle right then you probably shouldnt be tuning in the first place. The key is to raise the timing. Raising the timing will make a 108-112ls car idle very close to the 115-117. You only need to change the timing in the idle section of the timing table. With this LS you also will get more power out of the engine itself.
Food for thought.
Originally Posted by TS6
My cars always been NA with a small nitrous shot, but I've been pondering a blower (procharger) or a turbo setup instead of the bottle. I don't want to change cams though, and I know the convertor is too big (4200 stall). How bad are these specs for FI?: 228/236 112 LSA 108 ICL .588/.602 I think its an XE-R grind. I also have MTI stage 2 heads milled .030 if that matters. Perhaps the compression might be too high to even consider FI? Its a stock bottom end too (for now). Thanks for the help!
You should be able to keep everything you have, and run no more than 8 PSI. all you need to do is take your heads off and open them up to 72cc then you will be good to go for the blower or turbo.
I would highly recommend against the blown setup with 11.1. Way too many opprotunities for disaster.
More food for thought.
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Originally Posted by TS6
My cars always been NA with a small nitrous shot, but I've been pondering a blower (procharger) or a turbo setup instead of the bottle. I don't want to change cams though, and I know the convertor is too big (4200 stall). How bad are these specs for FI?: 228/236 112 LSA 108 ICL .588/.602 I think its an XE-R grind. I also have MTI stage 2 heads milled .030 if that matters. Perhaps the compression might be too high to even consider FI? Its a stock bottom end too (for now). Thanks for the help!
2) Sounds like you might be at 10.5:1 compression now. Not ideal, but it can work for 400-500rwhp but you will need good tuning to make sure the combo is not on the edge.
3) Your cam has a lot of overlap, so it's not optimal but like most cams that size it will probably make more midrange power than a stock cam. Peak should be higher too, but it might die off sooner than say if you ran a cam with less overlap @ .050.
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