How far do you think you could push a stock block vortech setup on a revup motor? I know its a lot less tq so I was thinking youd be able to push it a little more than you would a TT or ST setup. Im running a 2.87 right now on mine with full exhaust, spacer, fuel return, jwt clutch, and utec. Would running a 2.62 or pushing it to around 450whp be too much for the stock block to handle you think?

 

I think sentry is doing this already

 

^Look into Sentry65 and Jet Mech.

 

its all about cylinder pressure.......w/10.5 to 1 stock compression...i don't know if i would push it anymore then what you already have(11psi)......unless you are planning on building the engine in the near future and just wanting to test the stock engine

 

You should talk to SlowHuH. He has managed to get 450whp @ 9psi. J/K

 

Haha dont start that **** here. Lol. SlowHuH was probably using his butt dyno. Which doesnt count for anything cause thats probably the first boosted car hes been in.

But back on topic, I think Function Tuned (not positive if thats the shop) pushed the stock block to like 550 rwhp before blowing it. The reason they blew it was because of a major temperature drop or something of that nature. But even if it was still running, who knows what the longevity of the motor would be.

 

I think Performance Factory would be helpful in knowing how far they can push the block. Considering they blew one the fawk up.

 

sentry65 is making 477 rwhp,390 rwtq with a vortech on the non rev up stock block and heads. he has cam's thought. but like what was stated above, high tourqe is what kills the stock block not necessarily high horse power. the major limiting factor on the stock block is the connecting rods! they are the weak link. that is why i belive with a vortech it is possible to run higher boost numbers than a turbo system and still keep the stock block intact with the proper supporting mods and tune, especialy quality fuel(100 octane or better).

 

somebody please chime in on this and correct me if i am wrong. but dosen't the rev-up have slightly beefier rods, forged pistons,better oil pump,intake and exhaust cam phasing as well as beefier cams compared to the non rev up? oh yeah! and burn more oil...........j/k.

 

yes that's all true

and it's still a 10.3:1 CR just like the original VQ, not 10.5:1 like nomyth46 mentioned

IMO if you're wanting the stock block to be reliable:
-don't rev beyond the stock redline with boost
-make absolute sure you never detonate, so use higher than 91 octane gas and/or water/meth injection
-make sure the car is warmed up before driving hard (say 140 degree coolant and oil temp min)
-balance your overall exhaust/breathing with the amount of air you have going into the engine. In other words, keep the boost pressure from getting too high for the rpm you're reving up to

something else people don't often think of, shorter gearing puts less stress on the engine at high rpms than longer gearing. It's the same concept as how redlining through 1st gear is less stressful than redlining through 5th or 6th gear. It all just goes by quicker before shifting and giving the engine a quick breather sooner instead of later

That all said, maybe someday I will switch to a 34 cog pulley and try to hit almost 500whp/400tq on the stock bottom end, but it won't be for awhile until I get some more mileage out of my current setup before pushing the breaking threshold of the engine and blower. But honestly, I'm pretty happy where I'm sitting with power for now. That and I almost don't see the point of more power until I get new tires - been looking at toyo R888's in 305's

 

Thanks for the info sentry. I do only rev to about 6900 and never really go to the 7100 redline on the revup. Also I do have the 3.9 final drive installed already so that I guess will help me. The only mods I really am looking into doing to gain more power is the 2.62 pulley and maybe a 28th s/c cog pulley. More than likely ill stick with just the 2.62 pulley and call it a day with that in terms of boost. At that point I should see around 13-14 psi...since Im hitting 11 right now correct? The other mod I should do is headers, since that the only part of the exhaust I have not done yet.