im in the middle of the build up on a 98 sunfire gt and the question is would you rather get the crank service from jpb (knife and edging and what ever else the do to it) or a lightened flywheel, its the first sunfire one that i have carried and the stock flywheel IS heavy. hope i get your thoughts on this. i can only do one which would be better?
thanks
What kind of power are you trying to produce out of your motor and how are you planning on producing this power?
www.kronosperformance.com / 732-742-8837
well so far its a n/a but you know like most of us we all want boost. but im being realistic about it, i dont think i will get anytime soon but i do have other mods going. ho mani, obx header, eagle rods, wiesco pistons .020 bore, valves 1mm oversized, rsm crank pulley, aem alt pulley, secret cam, clevitte bearings, high rev lifters, high flow cat and exhaust, motor mounts, msd 2 and thats all i got so far. but what do you think?
what would be best?
thanks
frikken sunfire wrote:well so far its a n/a but you know like most of us we all want boost. but im being realistic about it, i dont think i will get anytime soon but i do have other mods going. ho mani, obx header, eagle rods, wiesco pistons .020 bore, valves 1mm oversized, rsm crank pulley, aem alt pulley, secret cam, clevitte bearings, high rev lifters, high flow cat and exhaust, motor mounts, msd 2 and thats all i got so far. but what do you think?
what would be best?
thanks
Well first of all, are you rebuilding your motor just to rebuild it or was there some type of problem and you had to open up your motor anyways?
If you're rebuilding your motor just cause, the amount of money you're spending in parts to do a top to bottom job (and labor if you're paying someone to do it), you could have parts for boost or a turbo kit if turbo is really the route you WANT to do.
Also, what compression were you trying to run? There really isn't much point in doing all those engine modifications and staying stock compression...the gains on what you listed aren't as much as one would think.
Anyways, to answer your original question about the crank, there really is no need to do crank work because it can handle way more power than you're going to produce from the modifications you listed.
www.kronosperformance.com / 732-742-8837
my car over heated and didnt want to start anymore. not only that but ive had the secret cams in my room for almost 9 months now. but to put those in its a pain. and if you have everthing out might as well do what you can. so i got some cash and decided to do all this. i know it aint killer power but this engine has not runned well for a while. plus it was knocking. but like i said boost is always a possibility but not on the horizon yet. so just trying to be prepared for it. and yeah i am gonna go with 9:1 comp. i think that is around stock right. im getting them from karo (the man). plus i did forget to mention i want to get nitrous for my car. so thats why im getting the pistons and rods and stuff.
so to break it down it all happened like this.
started with the obx header intake and muffler.
then the ho manifold.
then my car knocked so i wanted to rebuild.
if you get the secret cams it is recommended that you get the lifters. according to the org. so i got them. if you have that out already why not change the valves and get bigger ones at that. i know bigger ones hurt the low end a little but "boost may be in the horizon". then do a port and polish which i am also getting done.
then i came with the idea of nitrous. i know that the valvetrain can handle it but not the bottom, and since i was gonna rebuild might as well if you have the cash. so thats where the pistons and rods come in and might as well get bigger pistons while you are at it. but why change those if you are not gonna change bearings? so thats why im changing those too.
so thats why im getting all that stuff because if im gonna do this im gonna do it right so it doesnt break on me and so i dont have to go through the trouble of taking the engine out and all.
to explain the msd 2 my friend had it brand new sold his car and he sold it to me for about 150. you cant beat that!
motor mounts, crank pulley, alt pulley are all bolt ons that most of us start with so thats why i have those.
but like i said flywheel or crank.
if you noticed im trying to prepare for boost but at the same time if not possible i can still have a strong engine. im not really trying to have a 500hp engine but just something that can take some V-tecs out. haha.
so let me know?
Goin all motor and only runnin 9:1 compression isnt gonna do a whole lot in terms of power even with the other parts. Better slap a turbo on there if you wanna run a good bit faster. But an Ecotec should be able to handle a VTEC with the right driver I'd think. As far as the crank....if it were me, I wouldn't do it. And I noticed you wanted to PnP the head, thats all good if you have enough cam. If you don't, you won't see strong gains. This definately sounds good and in the general direction I wanna go in with mine, myself. Only difference is, if i stay all motor I'll go with something like 10.5:1 pistons and go .020" or .030" overbore. Since you're building for boost as you said, boost it and spray it, man. You've got good parts and if its put together right, it should handle it and work really well. And if you're into dragging, you might even make the Top 5 list. Good luck.
I root for the underdog...figured I might as well be one
Oh yeah one more thing, get a good tune thats the key especially on a boosted engine. Im talking dynojet if theres one close.
I root for the underdog...figured I might as well be one
I'm in the process of building basically the same engine as you, my car runs fine but I want to build a new motor for a turbo setup, so I'm getting a brand new GM std/std crank and JBP is doing the whole shooting match ( knife edge, lightening, melonizing and 2.3 oil pump gear), I already have the Eagle rods, Wiesco .040 9:1 pistons, Hellfire top/ Total Seal 2nd / Standard oil rings, Coated CL-77 H series rod & main bearings, ARP head & main studs, ported 086 head & HO intake, custom turbo cams, custom turbo header, 60-1 turbo, FMIC, HP Tuners software. I'm hoping to make 400-500 whp, so personally I believe in over building the bottom end then make as much hp/tq as you can with your topend. At least this way you'll have a litte more piece of mind instead of constantly wondering when something is gonna break if you use weaker parts.
2000 Z24 5spd header & catback for now.
