Possible to get 325whp from internals?

[Slipstream]

I'm rebuilding my sr. So far the bottom end is eagle rods w/ wiseco pistons. I might change the pistons to Race Engineering pistons. the head will be p&ped. My goal is 325whp. What top end should i go with that will be safe for that amount of power? I know I'll need a different turbo than the T25 and a Z32 MAF. What else will need to be changed?

If anyone is getting these numbers, can you state your set-up? The plan is reliable, streetable power.

[DrifterProdigy85]

Check out my cardomain in my sig for my setup. I havnt dynoed with the new turbo setup but im definitly over 370whp on stock block and stock headgasket. 325whp is easily doable with a stock engine with the basic air and fuel upgrades.

[vutony]

you dont need to do a rebuild for 325 whp unless u threw a bearing or somethin, ive seen 400 w/ stock bottom end but some head work, turbo, tuned ecu, etc...

[Gramentz]

you dont need to do a rebuild for 325 whp unless u threw a bearing or somethin, ive seen 400 w/ stock bottom end but some head work, turbo, tuned ecu, etc...

[da40]

thats impressive ..on a stock hg too

[Slipstream]

The reason I'm rebuilding is for class. I'm taking a high-performance engine building class. we have to do a complete teardown of the engine and start from scratch. That's why I wanted to see what internals to go with. One of my donor engines already had the eagle rods/wiseco pistons in it. So I'm planning on reusing those. Except one rod was heat damaged due to a broken oil squirter. So, that one will have to be replaced.

I want to do a set-up that has a good high rpm range and fast power response. i haven't disassembled the head head caus ethis class is only block and rotating assembly. Head is next quarter. How much power can the stock S15 pistons handle? I heard that they have a better oil flow than S13 ones. I'm trying to keep the costs down cause i have a kid and bills, so whatever I can achieve that is reliable and cheap is good.

[DrifterProdigy85]

stock SR pistons and rods have held up over 500whp. the key is no detonation. SR pistons are ceramic i believe which can break with detonation.

[da40]

what about hg i dont think it could take that much hp???

[redline19]

I'm rebuilding my sr. So far the bottom end is eagle rods w/ wiseco pistons. I might change the pistons to Race Engineering pistons. the head will be p&ped. My goal is 325whp. What top end should i go with that will be safe for that amount of power? I know I'll need a different turbo than the T25 and a Z32 MAF. What else will need to be changed?

If anyone is getting these numbers, can you state your set-up? The plan is reliable, streetable power.

top end you have a variety of choices, depending on what your budget is. If you just want to get to 325whp, you might think about going to something a little bigger than a S15 turbo, and usually the next turbo up for the price would be a gt2871r. next if you haven't already done so, upgrade your 370 injectors for bigger ones bc they'll max out in the mid 200hp range. the choice of injectors is up to you depending on the future upgrades and such but 555cc are commonly used. high end if you want you could go with a greddy intake manifold with hks step 1s or step 2, but for the hp you're looking for, you could make 325whp easily with just the turbo upgrade, injectors and a boost controller.

also depending on the motor, if you ahve the s14 version sr20det you should take a look at a bigger throttle body from a sr20de non turbo and if you want quick response, maybe a V-mount system would be better.

[DrifterProdigy85]

im pushing close to 400whp on stock HG right now. if you have the head off, then replace it.

[wildacexxx]

if u can up the compression a little. give it a little more quick

[Slipstream]

I believe the piston and rod set I have bumps up the compression to 9:1. I'll have to check again to make sure. I'm definitely gonna need a new hg. The motor (s13 blacktop) had the stock gasket and it pretty much fell apart after removing the head. But this block at least looks in way better shape than the last one.

If anyone wants a block to bore .040" over, let me know.

[DrifterProdigy85]

since you have the head off, mind as well stick a thick 1.2mm or larger HG in to lower compression down to handle high boost on pump gas.