parish8

iTrader: (6)

it is 4wd, i am running the stock firejunks. on that run i pulled a 1.69 60'

Green Thunder

iTrader: (11)

Which air/water intercooler are you running?

parish8

iTrader: (6)

it is a special made unit just for the cmotorsports kits. i think the dimentions of the core are about 4.5"x9x9. here is a pic.

Green Thunder

iTrader: (11)

Any Idea how much CFM it flows?

Rick@Synergy

iTrader: (5)

Honestly Jim, if you want to make the turbo work less and drop you IAT's while making a **** load more power...PUT a good set of heads on this thing. You are chocking the heck out of it right now. That same amount of boost will net you stronger results because you are increasing Motor efficientcy. Thats the key to making power.

Rick

XLR8NSS

iTrader: (4)

It looks real similiar to the unit shown in the attatchment which flows 1500cfm. That should be good for about 1000hp at the flywheel.

Green Thunder

iTrader: (11)

I dont think his is that big.. Look at his measurements.. I guess its pretty close

XLR8NSS

iTrader: (4)

The core on that one in the pic is 4.5*9*10. Pretty close to what he said.

Jim go measure it fool.

Green Thunder

iTrader: (11)

I guess this is the ole snow ball effect... Started out content with 500 -700 hp and now cant get enough huh... It sux! If you decided to go for Heads, Turbo, intercooler your talking about 5 G's or more... I feel your pain my friend..
And they say crack is an addiction
Is there such a thing as enough?

If we could only see into the future...

parish8

iTrader: (6)

there was no snow ball effect. i wanted 1000rwhp and 9's before i got the truck. i just can't spend all the cash to do it at once so am trying to get the bast bang for my buck right now.

eventualy i will have a monster intercooler, a thumper and heads. just trying to decide what is holding me back the most right now.

seems people are all over the place on this one. i was hoping for a general agreement on what would give me the most for now but everyone is sugesting diferent things.

i just went and measured it. it is 4.5" x 7" x 9" so it is smaller than the one you posted.

i dont think it is a restriction but i am sure it could do more cooling.

Jammer

iTrader: (1)

I agree on the T-88 and perhaps a small shot of N2O on the intercooler for track passes... just to ceool her down a lilttle,... but the turbo, when in its efficiency range will not create as much heat as whn its out of range, so I think thats your answer. I run two 76mm small frame units...(had front, now almost done with rear) and my IATs have been fine, even with a weak intercooler.

Green Thunder

iTrader: (11)

Actually I'll bet it is.. Not sure where XLR found those pics but maybe he can see if there is one in those dimensions that will give CFM.. I am guessing 1200? You have to be close on maxing that thing out... Just my .02.. If you get curious I will send you mine 2000cfm for a day or two for testing, if you think you can find a temporary way to mount it and plumb it..

smokinHawk

iTrader: (48)

well, if your out of the ideal efficency range, sounds like you should set up to a bigger turbo.
Though i still think your IC is a bit undersized. you're going to need over 100 square inches of airflow area for that much HP. you have about half that.

you could step up to an T88, a T6 frame would be good, but if you dont want to change your header then keep the t4 flange and do something like a percision, it should be able to take you up to 1000rwhp

TurboBerserker

iTrader: (1)

Well, my 0.02 is to do heads for 2 reasons. First, as Rick said, you are really choking the 408 with stock heads on it. Second, while you might be pushing out of the efficiency range now, better flowing heads will change that and you may not need a new turbo. I don't remember the exact figure, but if memory serves a t76 should support very close to 1000 hp.

parish8

iTrader: (6)

i think heads would put me even farthur out of my efficency range. i will flow even more air at the same boost as i am now. figure i might flow 90lb's of air at only 1.9bar and see where that puts me on that chart above.


seems like the best route would be steping up the turbo.

kbracing96

iTrader: (25)

I would think with better heads you could flow more volume with less pressure, so your turbo would not be working as hard and your intake temps would be lower. You would see less boost, but more, cooler, denser air. I'd say you would still need a bigger turbo to go with those heads, to really take advantage of them and keep you compressor in it efficiency range.

parish8

iTrader: (6)

i would see more flow at less boost but the compresor would be farthur out of it's efficiency range so i might end up with the same intake temps. not really sure how all of that works.

Louis

iTrader: (7)

you are right jim. You are simply off the chart with that turbo. Anything other than going bigger will be wasted.

hellbents10

iTrader: (10)

You would be best off upgrading the Turbo to save you so many headaches. Not to mention the nice chunck of change you could get selling your T-76. You will get next to nothing for your stock heads. I really do not see how a head with a 210cc runner is chocking this motor. People make a lot more with less runner. IF the heads are chocking it so bad then the intake would be doing the same. The Turbo is the problem. The high IAT's is from a compressor housing that is too small. The kr problems are from the combonation of the small t-4 hot side and the log/downpipe.

parish8

iTrader: (6)

i have no knock problems. i was running aprox 103 octane and didn't see any knock at all. now that i think about it i should have tried a little more timing.

now for what turbo.

i dont plan on pushing 2000hp or anything like that. i think the 300-400hp more that the t88 would offer me is going to be pleanty. is there any other turbo i should consider?