All Motor People, Speak!
02-02-2005, 07:35 PM
#24
Registered User
Originally Posted by JSR_AP2' date='Jan 31 2005, 11:26 AM
I don't have any mods yet, but I'd like to see someone try the following:
Toda SpecB or SpecC cams
Toda pistons (sanded to 12:1CR)
I know many ppl don't run the bigger Toda cams due to the need for bigger valve reliefs and Toda pistons having a pump-gas-unfriendly 13:1 CR, but if you sand the top down to 12:1, you should be able to run pump gas w/ tuning (standalone). It'd be nice to see if this setup would make considerably more power than the SpecAs.
Toda SpecB or SpecC cams
Toda pistons (sanded to 12:1CR)
I know many ppl don't run the bigger Toda cams due to the need for bigger valve reliefs and Toda pistons having a pump-gas-unfriendly 13:1 CR, but if you sand the top down to 12:1, you should be able to run pump gas w/ tuning (standalone). It'd be nice to see if this setup would make considerably more power than the SpecAs.
Hope this helps
02-03-2005, 05:27 AM
#25
Registered User
Originally Posted by learnerspermit' date='Feb 2 2005, 11:35 PM
I know you cant run a Spec B on a 2.0 with out the Stroker Kit(2.2)
02-03-2005, 08:45 AM
#27
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Hmm...no mo pistons huh?...that sucks...that means can't run the larger cams. Unless I take my stock pistons and cut bigger valve reliefs.
For the compression, if it's 12.7 with the Toda stroker kit, it should've been 12.7 if you run the Toda pistons (which seem no longer available, so this is a moot point, but I'm bored at work) on a 04+. Anyways, it doesn't seem like anyone but the JDM tuners will go crazy on NA. I'm not too fond of those stroker kit setups either...I wouldn't go much beyond the stroke of the F22C.
For the compression, if it's 12.7 with the Toda stroker kit, it should've been 12.7 if you run the Toda pistons (which seem no longer available, so this is a moot point, but I'm bored at work) on a 04+. Anyways, it doesn't seem like anyone but the JDM tuners will go crazy on NA. I'm not too fond of those stroker kit setups either...I wouldn't go much beyond the stroke of the F22C.
02-03-2005, 05:23 PM
#30
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[Quote: By the way... when you say "a lot of advance", how much do you mean? 2 degrees, 4 degrees, 15 degrees?]
Depending on your valve to piston clearance (which I don't think will be a problem) you can advance the timing 8 to 10 CRANKSHAFT degrees.
This is what I would do. Determine what the stock CRANKING compression pressure is (likely 160 psi or so). I'm sure many members can give you that information.
The larger camshaft will likely reduce that number by 10 to 20 psi.
Advance the camshaft until the cranking compression is 10 to 20 MORE THAN THE STOCK cranking compression.
Then go out and test drive the car. You will notice a marked improvement in throttle response and overall HP.
If you're the kind of guy who doesn't mind taking a little risk, I made some offset woodruff keys to change the camshaft timing (prior to Toda releasing there camshaft gears in June of 2004).
I took a woodruff key that was wider than the stock key and machined one side off at the top of the key and the other side off on the lower portion of the key. They worked great. I made 5 or 6 runs with them, and my valve spring seat force is ~ 40% higher than stock.
It's a quick and dirty way to prove to yourself that this will work prior to spending the $400 for the Toda gears.
Greenlight
Depending on your valve to piston clearance (which I don't think will be a problem) you can advance the timing 8 to 10 CRANKSHAFT degrees.
This is what I would do. Determine what the stock CRANKING compression pressure is (likely 160 psi or so). I'm sure many members can give you that information.
The larger camshaft will likely reduce that number by 10 to 20 psi.
Advance the camshaft until the cranking compression is 10 to 20 MORE THAN THE STOCK cranking compression.
Then go out and test drive the car. You will notice a marked improvement in throttle response and overall HP.
If you're the kind of guy who doesn't mind taking a little risk, I made some offset woodruff keys to change the camshaft timing (prior to Toda releasing there camshaft gears in June of 2004).
I took a woodruff key that was wider than the stock key and machined one side off at the top of the key and the other side off on the lower portion of the key. They worked great. I made 5 or 6 runs with them, and my valve spring seat force is ~ 40% higher than stock.
It's a quick and dirty way to prove to yourself that this will work prior to spending the $400 for the Toda gears.
Greenlight