Higher compression worth the mod?

[94califiveoh]

Trying to piece together a h/c/i combo. Say I just go for the TFS top end kit, with some longtubes, and supporting mods, will raising my compression ratio to 10.5 make a difference in hp?

 

[AaRoN]

Yes.

 

[94califiveoh]

soo, if the average h/c/i combo makes roughly 300hp, will I see roughly 325?

 

[94califiveoh]

and a tune?

 

[AaRoN]

At least.

 

[94califiveoh]

ok, thanks for your input aaron

 

[AaRoN]

Not a problem.

 

[Petek]

high compression also means more efficiency.

 

[uncltrvlnmatt]

If you have high miles new heads with higher compression could also mean blowby. Your rings will be the weak link.

 

[94califiveoh]

its a complete rebuild,new rings, pistons, bearings, etc..

 

[duff daddy]

psh 10's are low compression haha

 

[uncltrvlnmatt]

its a complete rebuild,new rings, pistons, bearings, etc..

You should be good to go then.

 

[Paul]

Each point of compression is worth about 4% horsepower... ballpark.

 

[94califiveoh]

Do you guys know if i'll still be able to run pump gas with 10.5? keep in mind we only have up to 91 Octane here in cali. Or should I go with 10.0?

I will be running a set of TW heads, stock tranny, with 3.73 gears...if that helps

 

[blackpony]

you can go as high as 11:1 if you want on pump.. just think, the new 5.0's are almost 11:1 stock..... most of the ls motors are 10:1 stock..

 

[duff daddy]

you can run high mid 11's on 93 ocaten, if you can you can run 13:1 compression on e85 if its available to you.

 

[94califiveoh]

soo, if the average h/c/i combo makes roughly 300hp, will I see roughly 325?

At least.

umm, not even close to 325. My car made 294...

 

[BlkoutGT]

Need some more specifics- like heads, pistons, intake, headers etc...

 

[Venom351R]

With the timing bumped you will have to run higher octane ( 91 ) and does not make much sense to run H/C/I set up and keep the stock timing

 

[Ninety8stang]

you can run high mid 11's on 93 ocaten, if you can you can run 13:1 compression on e85 if its available to you.

ohh the 11's are so steetable. you can even run 91 octane with a slight bit of timing pulled.