I am wanting to build the bottom end on my car. I am thinking 14lbs of boost with forged rods/pistons. I might get the heads ported to. I run a procharged d1 stage 2. I want to still run pump gas "no e85" because it still is a dd for right now. What would be the best compression for me? Looking to make 700 to 750 rwhp. Thanks for your help.
Compression for boost
- Thread starter Notfast2012
- Start date
IMO stock compression (11:1). With a built motor you should be able to run 700-750 safely on 93.
Yea We keep the compression up and would rather take the boost out.
The car has much better street manors with the higher compression also these cars are pretty lazy once you knock the compression out
The car has much better street manors with the higher compression also these cars are pretty lazy once you knock the compression out
Ok thank u very much! Do u guys offer rods/piston kit with arp head studs/main studs? That's a awesome price on the Paxton by the way!
Yes sir i can work something up for you
Are you looking for H beams or Billet Rods
H beams unless the price isn't much different
I beams are pretty Pricey
Ill work it up tonight and shoot you a PM tomorrow :beer:
Thank u very much for ur help!
I don't know about running 11:1 14psi and 93 octane.
If I was u I would always run Torco or Lucas. If u can afford to build a motor u can afford the fuel.
Less boost and more compression for the win.
Plus less boost equals alot less heat soak on the street.
If I was u I would always run Torco or Lucas. If u can afford to build a motor u can afford the fuel.
Less boost and more compression for the win.
Plus less boost equals alot less heat soak on the street.
Yeah I have no problem spending the money on fuel expect lack of resources of race fuel in my area or when I travel. Same with e85. Maybe 10.5 to 1 might be the best of both worlds? I run 10 psi now but would like more power and reliable. If more power and reliable go together! Lol thanks for advice.
not many pistons made for the coyote are offered in that comp ratio and would have to be custom made, and that takes about 4 weeks. I have been going through this same thing you are for the past month and I finally setteled on the 10:1 it will be low enough to put some good ol boost too, and it also keeps the compression somewhat high to give it good street manners if being on pump and or e85, race gas, or pump and meth!
How does low compression/higher boost make it less streetable?
^ are you sure it's 10.5.1? cause I called and they said they have 11.1,10.1,and 9.5.1 only! and if any other compression is wanted it had to be custom made putting a short block another 3-4 weeks on top of 3 weeks for a build so 6-7 weeks total! and for a roatating ass. 4 weeks for the pistons!
Id do 10:1 and buy a meth kit. Thats what my setup is and my engine is being built right now at 10:1(not a 5.0 but same principle). My tuner said 14-17psi for the street and 20-21 for a high boost tune all on just 93+meth.
Yeah, I have the paperwork. It's the MMR 1500. I bought the car used with it already installed.
If I had to do it again, I would just go 10.0 to 1. It's still plenty of compression for good throttle response.
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There are other ways to change compression ratio except pistons.
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