Originally Posted by jonnyshaw49
no not got headwork done and tbh av been put off getting it done by quite a few people on here, unsure on power really as long as its fun and good to drive i dont mind lol thnink anything over 180bhp in a gt turbo is plenty really
true, why have you been put off by headwork on here??? what are the reasons??i thought it was good for turbo'd cars thanks
people say its not really worth it as the standard head flows enough for 200+bhp iirc, but iv always had the heads done on my car and been tested on a flow bench and the cfm for inlet and exhaust always been miles better.
hope you dont mind me jumping in on this thread but im just starting to look at turbo upgrade and cam upgrade also. But after reading through this thread i think i might have been thinking along the wrong lines (as in too big) Was thinking of the following give or take-
Piper 300 cam with uprated springs
min T28 or T3
obviously carb work (not a group A!) but not sure what jets i would need
also what other work would i need in the way of the block (pistons rods etc?)
lightened and ballenced flywheel?
Its ONLY to be used for 1/4 miles so as long as my power is somewhere between 4500- 7000rpm hopefully and would like to see the high side of 250bhp
like i said i think i have been looking a bit too high so i don't need the next 10 replys or so to be just slaging comments please
thanks
christ on a turbo and cam that big you can go way past 7k fella
i have been offered the t3 for free
The right T3 is probably a good choice for what you want to do, but it's far from easy to fit one.i have been offered the t3 for free
I wouldn't use a Piper 300, too much overlap for high boost
yes, I can vouch for the BP300 not working with much more than 20lb of boost. BP285 with a vernier is what you want for now. It takes a lot of effort to improve on that.
thanks for the replys, but what you think about the block/ pistons. can remember some people saying just stick with the standard parts?
think i read pistons are good for 270bhp and rods 400+ this might be wrong but iv heard it a few times now
cripes, there arn't enough people with 400hp in a C1J to validate that statement. maybe only the one person, gianni santi. I did not ask him what rods he had, most likely not standard.
but for the 200+ hp goal the standard parts will be adequate. pistons being more prone to failure than the rods, so if anything, buy some reputable pistons. ofcourse, don't buy them unless you are 100% confident of your tuning ability. there's nothing more gut wrenching then melting a brand new £600 set of pistons because you got the jetting, or timing slightly wrong
lol as i said i actually dont know if thats the truth its just something id heard a couple times, personally i wouldnt trust standard rods,pistons over 220bhp tbh
Im still convinced that you can get away with a cast piston DONE RIGHT, Ok i aint calling forged pistons as they are good... But take our honda, we run chinese copys of the vitara OE pistons, so cheap as chips £50 brand new.. They are cast and nothing fancy, just have a larger tapper, and with an increased Piston to wall to match your tune you should find it would work well.. Ive seen peeps over 500hp on casts... Why doesnt anyone try this with a renault pistons?
thats probably quite sensible for the pistons atleast. the rods are pretty bullet proof, although I've seen some bannana shaped ones that came out of stuart clarkes engine. everything has it's limits
james willday did ages ago at a EP rolling road days. his car was rattling like a good'un until it got hot.
Interesting.... plus if your to loose that aint good either, where will the heat go.... I thought Ian just fitted old worn pistons from what he told me years back? never said he machined them in anyway? Prob was down to the tune for the fail....
james had had those steel liners honed more times than I know, infact I remember talking to ian about it in his workshop one day.Interesting.... plus if your to loose that aint good either, where will the heat go.... I thought Ian just fitted old worn pistons from what he told me years back? never said he machined them in anyway? Prob was down to the tune for the fail....
yeah, funnily enough i asked willday about them too. he just said he had them honed again, and again and again...
but then again, he was well know for blowing his car up.
I can remember seeing his 5 being rebuilt numerous times, think in one year we counted 18 pistons!
Yep those liners got some honing
Scoff, atm I only have the Cam but not the pulley.... is it a sound investment or not much gain?
that depends entirely on how accurately piper gound that cam. from experience the answer is "not very" most of the time. you should check it's timing in the usual way with a DTI gauge and protractor wheel on the crank. If it times up OK then you don't need the pulley.
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