4age cam selection

[goodcookiedrift]

Hey doods, maybe you can help me out. I'm wondering what the max lift i can go before I a) have valves floating or b) have to convert to an under bucket shim

club4ag says that 8mm is the max lift but i see some 288's, 304's and such with 7.8 and 7.5mm lifts. so does this mean that as long as i get stiffer valve springs i can run such a high duration cam?

mind you, i don't think i want to go so high for a semi street use, but i'm curious if i can.

Nick

[bondobondo]

say what?? you got carbs????

[goodcookiedrift]

muhahahahahahahahahahahah!!!!!!!

Nick

[neil85AE86]

yes...as long as the lift is not too high, just add stiffer springs and away you go.

I've heard 8.3 is the limit, but some guys say you can go higher with no probs, if you want to get to the bottom of this, give Rich a call at tedcomponents.com, he knows valvetrains inside and out, and also sells some nice grinds made from new blanks (not regrinds) for a reasonable price ($400 US/pair), he'll also custom grind to your desired application.

I wouldn't go higher than 288 if your gonna run on the street at all.

Keep in mind that you should not get any more spring than necessary, since they add alot of resistance, and can reduce the revability and horsepower if you go overkill. Strong springs also cause drastically accelerated cam wear.

You may want to go with something like a 276 with a fresh set of stock springs, but that would probably limit you to ~7500 rpm before float.

Neil

[goodcookiedrift]

so how do i determine if a spring is too stiff or too soft? are there spring rates per duration and lift of cam?

Neil, give me a holla someitme...i might get those checkman's off of you....depending on the ride height.

Nick

[neil85AE86]

3" drop I hear, Yasin runs them with his Illuminas and has had great results.

A bit much for me, kg/mm 2" drop would be nice.

Neil

[goodcookiedrift]

how is it that everyone except me can run short springs on illuminas? is there a short stroke version of illuminas? because i don't see how.

hey, i don't mind a 3 inch drop...a bit much...2.25 would be okay.
3inch...might have to go with under axle exhaust no?

Nick

[driiift_hachiroku]

I know from seeing Yasin's and Mac's car (which both run those Checkman's) that their cars sit VERY low.

For some reason, Mac's car was lower than Yasin's car, but mac got some spring spacers built, so that wasn't a problem.

They both ran over-the-axle exhausts without any problems.

Maybe you should ask Mac himself as well as other Dori-kaze guys on their experience with those springs.

<font size=-1>[ This Message was edited by: driiift_hachiroku on 2001-12-03 21:01 ]</font>

[goodcookiedrift]

some guy on club4ag selling trd japan racce springs...10k front and 8k rear...for 175! and we thought yers were stiff eh jover!!!???

i want a spring that will compliment the hts and the coils in the front well.

Nick