Why is everyone shocked by the fact that this thing doesn't spool like the stock turbo? It's a big freakin turbo.

400 at the wheels on 91 with horrible conditions, on low boost, and at low revs... I'd say that's pretty darn impressive.

 

+1

 

I agree that is a good number for the dyno and conditions.

Someone bring an 8 or 9 and see what it does on that dyno on the same conditions I assure you it will be the same.

Nice numbers guys.

Mitch M

 

hmmmm....I might be sold....

 

Don't you think that's a little bit on the lean side? Almost dangerously lean on high boost and in hot weather if you ask me. Of course the X seems a little bit more resistant to detonation than the 4g63 for some reason, I would imagaine the square bore and stroke helps a bit. What do you think that you guys are going to push it to, 30 psi maybe? That turbo should hold 30 psi from peak to redline, but that's gonna be pushing the stock motor a bit I think. As I said earlier I think that the head separating from the block is going to be the main concern moreso than the block warping or the sleeves giving out.

Hell, stock honda open deck and GM ecotec blocks have seen 700+hp on the stock block and sleeves, and the 4b11 is as well reinforced or better than both so I don't think that we will have to worry about sleeving the block like everyone including me thought initially. I think some ARP headstuds and a better head gasket igh be worthwhile mods to do before you guys go crazy with this thing. If you want to make the 600 hp that you've been talking about I think that this would be something to consider.

 

I'm pretty sure the turbo will hold 30psi to redline easily...turbine wheel is bigger than a standard 35r wheel. Remember the housing is a t4 also, so for the inital tune, i think the spool is pretty decent For anyone that doesn't plan on pushing things, i think a .70ar housing will work fine and hit full boost atleast a few hundred rpm's sooner.

Jesse

 

Now someone needs to see what a 50 trim and a 3076 will do.

 

we plan on swithcing things around to see how different turbos react to the X

 

Let them put the stock OEM parts to more abuse then we can all see how strong it is compared to the 4g63

 

The AFR's are at the tail pipe... So its still richer than 12.1

Also in order to make peak power 12.5 AFR's are the best, now is that safe??? maybe not but we are testing it for peak power, not power that would see a road course in this heat...

I assure you this car/kit will take 30 psi and make some nice numbers. Rome wasnt built in one day, neither was all the High whp VIII/IX's.

Evan Smith

 

Agreed, but I'm just saying that aluminum blocks can handle big power if the internals are strong and the head is securely fastened to the block. That is usually the first thing to go in most high hp apps, not the block like everyone with this iron block superiority complex implies. I am not claiming that this motor is going to handle 1000 hp like the 4g63, but I think that 700 hp with built internals and ARP head studs to hold the top end down is a definite reality. Hell, if a GM ecotec and open deck honda motors can do it, the 4b11 for damn sure can do it also because it's built stronger than both. Time will tell I suppose.

 

I agree with some head studs at high boost and high hp levels so the head doesnt start to lift which can cause some problems... Seems the head is better than the IX but its better to be safe than sorry

 

I agree!

 

i hope this manifold will last longer then my agency power manifold did, but looks hot. The lag is way to much i hit full boost on my gt35 28psi 5000rpms with stock evo 8 cams i dont get why the lag is that bad

 

I don't read all the postings from this thread, but if you guys want to get cooler weather, come to NW, Seattle specially. Haha, we suppose to 'see' and feel summer instead we are still hitting lows 50's and sometime even low 40's.

That is one badass X.