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View Full Version : OEM or Upgraded Internals?


Rocko
03-21-2008, 08:00 AM
Iv been doing some research lately trying to figure out what I want to do with my car In terms of a Rebuild. I Guess I should give a little background on the car before I go asking questions.

The car is a 91 Coupe with an SR20DET Redtop swap. I just bought this car as a project and it came with a ton of parts already installed including a Forced Performance Big T28, 3 Inch Turbo-Back Exhaust, Profec B Boost Controler, Ect.

The motor currently has rod knock so im trying to figure out what route i want to go with a rebuild or a swapping shortblocks.

I want to shoot for ~300whp on the Turbo I have with supporting mods (fuel,tuning, cams, ignition, ect.) and have a motor capable of holding 450-500 if I chose to go big later. I realise that people have put down 500+ on the stock bottom end (Iv seen mentions of Enjuku's 540rwhp race car on a stock bottom) but Im curious to know how long the stock equipment will hold together at that power level.

Here are the options iv looked at and what I know so far, any advice on these or any alternatives would be helpful:

* Swap on a stock used shortblock: Cheap but I dont think there will be any way to tell how good the condition is since it probably wont come with any compression or leakdown test results and most likely unknown milage

*Rebuild to stock: Not too expensive and well within the budget I have for the car but Im not sure how much HP it can handel reliably

*Rebuild with an Eagle Rods/CP Pistons Combo: Sure to handel the power levels im looking at but definately more expensive.

So what does Zilvia think?

fliprayzin240sx
03-21-2008, 08:11 AM
If you got the money and can afford the down time...why the fuck not build it?

If you're broke, just do a fresh rebuild, bearings, rings and whatever else is fucked up on the bottom. I've seen enough people do a stock rebuild on their bottom end and stick a built head make 450 whp - 480whp.

Rocko
03-21-2008, 09:42 AM
Yeah downtime isnt really an issue, I usualy drive my truck and bike when im home....just a toy

I guess the question is weather or not the extra ~900 for upgraded rods and pistons is worth it for those power levels.

ManoNegra
03-21-2008, 09:50 AM
The way I see it I would do PE or Apexi hg and ARP rod and head bolts on. Rest OEM. Boost it to desired level and if/when it eventually it blows up get another block. But then again I'd only want ~350hp.

corriganjoshua
03-21-2008, 10:23 AM
I always upgrade my counterparts

WilloW
03-21-2008, 10:36 AM
If you got the money and can afford the down time...why the fuck not build it?



What he said ^^^. I had the same dilemma before, but I figured if I was going to tear it all apart then I might as well just do it with some insurance.

Rocko
03-21-2008, 12:38 PM
What he said ^^^. I had the same dilemma before, but I figured if I was going to tear it all apart then I might as well just do it with some insurance.

Yeah it sounds like the extra cash is going to be worth it.

Can anyone recommend a good place to get the whole rebuild kit? so far iv just seen places selling the components individually. Im sure i could google some upgraded rebuild kits but I want to know which ones are proven.

Dousan_PG
03-21-2008, 01:02 PM
if u have th emoney
upgrade inside too

Mi Beardo es Loco
03-21-2008, 01:03 PM
I would def say rebuild the internals with some forged components, but since you're not going for 500+ hp then I wouldn't go insane with the stroker or anything. Keep it modest (with the eagle rods etc), balance the crank, deck the block and just make sure the block is cleaned up before throwing it back in there. It just adds extra insurance that is much needed when you're doing hard driving. I would also advise to getting ARP rod bolts. If you want to spend a little extra then try to go arp head bolts but the rod bolts are a bit of a weak spot I found on the sr.

bmhossain
03-21-2008, 02:19 PM
Yeah it sounds like the extra cash is going to be worth it.

Can anyone recommend a good place to get the whole rebuild kit? so far iv just seen places selling the components individually. Im sure i could google some upgraded rebuild kits but I want to know which ones are proven.

www.240sxmotoring.com (http://www.240sxmotoring.com) A guy named Jeff there hooked me up with everything I needed. They don't sell a kit but I emailed them and he worked with me.

Sileighty_85
03-21-2008, 03:04 PM
For OEM Parts go to www.theNismoshop.com (http://www.theNismoshop.com) Cheapest prices for OEM as well as after markert parts Water Pump, Oil Pump, gaskets....
I got alot my my parts from www.enjukuracing.com (http://www.enjukuracing.com) and www.RHDJapan.com (http://www.RHDJapan.com)

But go full aftermarket, get your Crank blanced and polished for the New internals, The power band is sooo smooth, very minimal Vibration in the high RPMS