compression

[LETZRIDE]

For a N/A car, whats the max we cant put compression at, and how much of a difference would you notice...If and when I do go ahead with the cam/heads I'm going to have the guy mill the heads down to up compression...just wondering what the max is, especially for a DD, and what are the pros and cons of doing this.

[LETZRIDE]

Re: compression

anyone on any do's and donts regarding compression? this is for a N/A build up...

[bigbrian442]

Re: compression

There are too many things that affect how much compression you can run, like cam size and head flow. I wouldn't go up over half a point over stock for a DD. Compression is the basis of power in an engine, but with Cast iron heads and today's gas, you can find detonation very quickly. The higher compression the more timing your going to have to pull out.

[cam98aro]

Re: compression

i wonder how much compression our engines can handle

[LETZRIDE]

Re: compression

well this is most likely going to be with the abbott racing stage 2 heads and their N/A cam...I want to mill the heads down for added compression...this will all be topped off with a dyno tune...when upping the compression do I have to worry about reinforcing anything other then what already needs to be done with the cam...how will this effect my gas? and I shouldnt be too worried about detonation if it is tuned correctly?

[bigbrian442]

Re: compression

well this is most likely going to be with the abbott racing stage 2 heads and their N/A cam...I want to mill the heads down for added compression...this will all be topped off with a dyno tune...when upping the compression do I have to worry about reinforcing anything other then what already needs to be done with the cam...how will this effect my gas? and I shouldnt be too worried about detonation if it is tuned correctly?

Ask Abbott what compression they recommend. A good tune can't compensate for TOO much compression.

[LETZRIDE]

Re: compression

Ask Abbott what compression they recommend. A good tune can't compensate for TOO much compression.

Ok...so for arguements sake say I up the compression to whatever abbott recommends, what would I have to upgrade, do I need different pistons or am I ok? and how will upping the compression effect the gas milage of the vehicle...sorry Im tryna learn about compression and what not, it was mentioned to me that I should up it so I'm considering and trying to learn lol

[97rs4life]

Re: compression

what octane gas do you have around you? That will be the first thing to figure out as you are going to need high octane for a high compression engine.

[LETZRIDE]

Re: compression

91 octane around here

[rdrr96]

Re: compression

id talk to abbott and invest in some ARP head bolts. raising the compression will definately make you want to run premium gas to try to keep down the possibility of detonation.

i think the stroker kits bump you up to like 10.5:1 compression so... you might wanna just look into one of those.

[LETZRIDE]

Re: compression

stroker is a lot more work then just milling down the heads Im about to put in...

[97rs4life]

Re: compression

id talk to abbott and invest in some ARP head bolts. raising the compression will definately make you want to run premium gas to try to keep down the possibility of detonation.

i think the stroker kits bump you up to like 10.5:1 compression so... you might wanna just look into one of those.

no they don't, you can get low compression or high compression kits.

FWIW my engine that I am getting built up right now has 10.28:1 pistons and I also went with thinner MLS cometic gaskets to bump the compression up even more. Abbott stage 3 heads will be mated up to the engine. I have 93 octane around here and will be running nitrous :)

[rdrr96]

Re: compression

Ok...so for arguements sake say I up the compression to whatever abbott recommends, what would I have to upgrade, do I need different pistons or am I ok? and how will upping the compression effect the gas milage of the vehicle...sorry Im tryna learn about compression and what not, it was mentioned to me that I should up it so I'm considering and trying to learn lol

you also need to think about valve cleanarnce and all that jazz... with a bigger cam your valves are gonna open even more than they already do... with the lower profile of the head and all you might run into some of those issues.

[LETZRIDE]

Re: compression

no they don't, you can get low compression or high compression kits.

FWIW my engine that I am getting built up right now has 10.28:1 pistons and I also went with thinner MLS cometic gaskets to bump the compression up even more. Abbott stage 3 heads will be mated up to the engine. I have 93 octane around here and will be running nitrous :)

so I would have to change the pistons when upin the compression?

[97rs4life]

Re: compression

so I would have to change the pistons when upin the compression?

changing the pistons is a way of upping the compression. You can also mill heads or get thinner head gaskets as well