383 stroker

my bro gettin a 383 stroker kit for his 1990 Camaro.. Its an L98.. 350TPI auto

He wants to know what all will be involved, and what will have to be changed, or what Should be changed.. Ive never done it before so has anyone else??

like electrical wise? or?

He will toast his rearend and his tranny eventually. What setup is he using for intake??? Are you wondering about engine specifics or just the rest of the car??

Just engine specifics..

Its got the factory dual air intake, with 2 K&N filters.. Underneath both filters has also all been cut out and 4" ducting is run from each filter down by the factory fog lights

I just got the tranny re-done last winter.. It should hold up..

The block will have to be clearanced for the 4" stroke crank. Also it will have to be bored .030 to reach 383ci. What all comes with his kit? Is it a rotating assembly that includes bearings and everything or what? I would have the block decked, fluxed, and line bored as well. Depending on your valvetrain you may have to have your pistons fly cut.

the '90 z cars came w/ 700r4 trannys, he won't bust it i promise

he hasnt got the kit yet, but as far as I know, its the full rotating assy. with bearings, pistons and rings..
he wasnt sure if his stock heads will work or what mods would need to be done to them

The heads will depend on the valve sizes and what the pistons will except. Also depends on the intake he chooses to run. Personally I would go ahead and do a carb'd swap.

Just a little FYI: head porting will cost you out the ass.

He needs to figure out eveything before he buys a rotating assembly as in what heads, cam, intake, cause no part choice when it comes to engines are independent of each other.

nah.. me and him are both religiously against carbd..
He's lookin at the Performer intake and TPI runner kit

I dont think he's put much thought into it yet.. But i'll let him know what was metioned so far.. thanx for the help

Oh.. BTW recommend any decent cam/intake combo's??

For a cam, I'd call up Lunati or Edelbrock and have them recommend one for you. They have a program that takes the entire car into consideration. You tell them about the engine, which trans and converter, rear end , etc. and it figures out exactly where your horsepower and torque curves should be.

351wStang was right about the block but you might want to be careful about align boring. I was going to have this done too just to make sure everything is true but it shouldn't be done unless it's needs to be done. It moves the crank slightly higher up in the block which could throw off the timing a bit.

Everything else was pretty much covered already, only thing I can think of is the oil pan might have to be modified to make room for the crank, my friend had to do that for his 350.

look into the worlds rotating assembly in summit...and im goin with the brodix heads for mine

oh and is he aiming for high hp?? what does he want to get from the motor....

isnt it going to be really hard to change the crankshaft(stroker) like cant you mess up easily?

Nothing serious.. still a daily driver.. I think he said 300+ hp.. in that area... Im not sure if new heads are in his budget.. thats why I was wondering ifthe stockers had to be modified

maybe even to pick up a set of 350 Vortec heads from a wrecker

I figured that the power he wants to make would be easily obtainable without the stroker kit..
A full rebuild, new gm crank, all Clevite bearings forged everything, The proper cam, intake and runners, flat top pistons/plasma moly rings, some vortech p&p heads and a twin 58mm throttlebody, plus some ECM programming should easily be 300hp..

I'll try convince him to forget about the stroker kit.. Its too much for his first time inside an engine.. And I dont have the time to worry about it.. Im still barely halfway through Project 7MGTE

yea it should be in the easy 300s prolly close to 400.. the stroker kit would be badass tho... i love the way they idle.. are you going with a rollar cam or flat tappet?

If he cant go for new heads he could upgrade to the aluminum heads from the corvette. Have those reworked and that would help out a bit.

As far as intake goes, if he wants to keep the TPI, keep in mind that its a very long intake and the engine will start to drop off at around 4800 rpms. The low end torque a TPI 383 makes is great though.

If he wants a more higher revving style he would have to go with something shorter like an LT1 or miniram.

If he just wants 300hp he can save lots of money. No need for a stroker kit. A 350 with a stock stroke makes plenty of torque. All he needs to do is have his stock crank checked, rework stock rods, buy some hyper pistons, and have everything balanced. Then buy some Performer or Performer RPM heads depending on his rpm range, and go with whatever intake he wants for TPI, probably a fairly low profile one. With the money he saved not buying a crank and rods heads are easily in his price range. Then he can get the performer or performer rpm cam to kindof complete the power package. Just remember edelbrock calculates their cams on a stock rocker ratio. So he may want to look into some nice 1.5rr's. Hardened pushrods and guideplates wouldnt be a bad idea either.