I just dropped off the truck at James Northums to install my Goerend trans, and had him add a HTT 62/71/13 at the same time. My question is, how much boost is this thing going to make with my Smarty/Quad stack? I never really could make enough boost before to blow my head gaskets with the stock turbo, but with this thing, I might!

So should I just set some defueling parameters on my Commander to limit me to say 43psi....isnt that pretty much the highest psi stock head studs/gaskets can take?

BTW, Im really excited to see what this baby will do. Ive been watching you big dogs for a while now!

 

well, I had a long conversion with John @ Floor it yesterday about this same question.

The fact is... it's not how high of boost you can build.... it's how many CFM's you can push. Boost is resistance and if you aren't getting rid of what you're putting in you're gonna have heat issues.

If you can move equal amounts of air ( in/out) that's where you'll gain your hp. John had a good analogy... a air compressor motor pumps air into the tank. The tank can only take so much air before it starts to backup on itself. When it does... the motor will start to overheat. If the exhaust side of your truck is restricted, this is what will happen to the truck. It's trying to push more air than it can get rid of. This is where your boost will go through the roof but, you really aren't making more power. You're creating more heat which will eventually cause a melt down.

I don't know the 62 that well but, the fact it's got the 71 wheel helps. What might be a problem is the 13mm exhaust side. That's not much bigger than the stock, if not the same. The 71mm wheel is what makes the difference from stock.

I'm no expert on turbos and drive pressure so may explanation my be a little off but, big boost numbers don't necessaily mean high hp numbers.

 

It will be wastegated at 45 from HTT. Leave it there and you will have no worries with the stock head bolts.

 

BTW...the 13 mm exhaust is WAY bigger the the OEM 9 mm!

No comparason...hold both up sometime...lol.

 

I wasn't sure but, they're a lot closer in size than any other turbo 13mm is still pretty restrictive

 

Nah...that is why they have BIG wastegates...

Great exhaust housting...for a single turbo'd truck under 600 hp.

 

well I suppose it's all about what you're after. John was telling me they had to get rid of the 13mm housing and also go up on the wheel size. I've also seen many complain about heat with those turbos. Not HTT's just those sizes. That takes you back to may first sentence.

IMO... the silver bullet is a better sized turbo for 600hp and more. It spool as well as many small ones and moves some air !

 

i went to a 62/12 and it really dropped my egts

 

x2, i have no problem spooling mine. and as a daily driver, im more than happy with the SB.

 

My SPS66 was wastegated at 55psi in my '03. I ran it for 20k+ without issue, followed by a SPS62 wastegated at about 48-50psi. The truck still runs great today (as per new owner) at 75k+ miles...

 

x2


Boss....glad to finally see you step it up!

 

Thats right, gettin down!

 

So back to the topic at hand........will I be needing head studs running my new HTT 62/71/13ss????

 

I stopped and talked John at Floor It when I was in Lawrence last Friday. I told him I am looking to do Flux 1 injectors and a turbo and he recommended a 62/65/14 turbo to make 500-550hp. I asked about studs, and he didn't think I needed them.

There are 2 big things that kill head gaskets. What TritonT said, backpressure, which a 65-71mm exhaust wheel will take care of. The 71mm wheel will have a little more lag though. You also need to make sure your truck is at full operating temp before you kill it.

I also have to say thanks to John for helping me dial in my shift enhanser!!!

 

Im not worried about the lag with the 71, I wanted the extra growing room and from what I have heard it doesnt have too much lag anyhow. The 62/65/14 is geared more towards a towing application, but of course can be used for hp gains and playing. The 71 is just more of a performance turbo...at least from what I have read about it.