Because I have destroyed my block I am building a new one. I also must have the heads, because mine are not good anymore. What would you advise on a new built block that must handle 700hp. Internals and extra modifications for cooling, ... Its my daily driver and I use it a lot for drag racing. I am afraid that I could forget something to buy for extra cooling or ... Thx

 

What was the cause of failure for the old engine?

An upgraded radiator would be a good place to start for cooling if you haven't already, and you may look at opening the back coolant passage and using it as well.

I have a built and sleeved shortblock here that would suit your needs quite well, as well as Cosworth heads, etc. PM sent with more info.

 

1. Sleeve block
2. Arias ED pistons
3. Pauter con rods
4. New rod bearings
5. L19 head stud
6. arp main stud
7. New oil pump
8. Koyo radiator
9. Nismo thermostat
10. Stillen oil cooler
11. hks head gasket
12. New engine gasket
13. Radiator hoses
14. S2 fuel return
15. 750 injectors
16. Twin 255 lph fuel pumb
17. Oil catch can
18. Sparks
19. hks dli
20. Plenum
21. Machining block
22. Coated pistons recommended
23. Bigger fans recommended

Total = 12000 to 15000 including labor

you should be ready to go

 

I already have an oil cooler and I am going to instal a water methanol injection system. I dont know which one yet. I have an aps tt kit with the aps 3" exhaust and 3.5"downpipes. I am planning to boost up my Z to 600hp and drive safe then for the block. Can the standard APS fuel system hold that power?

 

In short the answer is no. The stock aps fuel system is good to 500 rwhp approximately.

 

Ha, You listed the same specs as the motor I pm'd him.

 

get the Nissan VQ35 Rear Coolant Bypass System from Forged Performance also.

 

I am going to buy the APS Extreme fuel system, forged solid motor mounts, rear coolant bypass system and greddy oil catch can. Already have APS inlet plenum, exhaust and JWT clutch and flywheel.

 

You need a good fuel system to feed the 600hp, the aps fuel system won't hold enogh. you also need 750 injectors and good fuel pump. if i'm pushing 600hp i will definitely go with S2 CJM or AAm fuel system. also, usn has mentioned the coolant bypass system which gives your motor more coolent under exterem pressure. if your going beyond 550 whp you need to get hks fcon vpro or any other standalone ecu that the your tuner familiar with.

 

the jwt clutch would not hold well when you push beyond 520whp. it begins to slip when heat kicks in. What kind of ecu you'll going to use? the aps extreme fuel system has 880cc injectors which i think are very large for your goal. stick with the 750cc, so you don't run throgh idle issues unless if you're running standalone unit. you might also consider S2 AAM fuel system.

 

I think the CJM Stage2 or APS extreme fuel system will do you good.
As for the APS system not being able to handle more then 600... I know someone who is using it for 600+ now and plans to push a lot more. I understand they had some problems, but they have been fixed a short while ago. This is 2nd hand knowledge of course.

I prefer the CJM myself. I think the quality is top notch and the new twin in-tank pump , when available, will be awesome.
--B

 

You dont need a sleeved motor at those power levels. I dont think anyone knows the limitations yet of the block, but people have made 650-700rwhp without any issues. Just make sure you have L19 or 1/2 in. headstuds and a nice hg.

 

When you push over 550whp the stock sleeves start weaken. He is going to use the car as a daily drive and he do lots of drag racing. I know the stock sleeves could handle even 750whp with the right setup and a proper tune, but there are many people break their block with only 540whp. In another word, do it right the first time if you are going over 550whp or stay in the safe side with stock sleeves. You don’t want to waste your time and money by taking the wrong option.

 

He said APS Extreme Fuel System... look it up on their web site. Should be MORE than enough.

 

This is untrue. There have not been any reported cases of stock block failure due to the stock sleeving!

People that have had problems with blowing motors, is due to tuning or lack there of!

 

The cases I have heard were sleeves failed were a result of other engine components going first. I also have not heard of anyone with a built motor cracking the sleeves before destroying rods or other mechanical parts. This is only based on my350z.com info and not from personal experience.

 

I think people "might" find that the stock sleeves are more sturdy than many think. But until we see a half dozen or so guys running a TRUE 650-750whp on stock sleeves, we are going to recommend sleeving for 600whp and beyond.

 

So for 600hp you dont recommend sleeving it?

 

It is somewhat uncharted territory. Until enough guinea pigs try it and prove they are either too weak or strong enough, why take the chance?

 

thats true