I am sorry if I am asking the same question that has already been answered but trust me I have tried. I have a 454 with 9.5:1 forged trw pistons, forged rods, forged crank, ported 69 'vette casting heads. I am interested in a twin turbo setup for this motor but can not figure out what my options for turbos are. as of now it makes 550 hp and 625 ft/lbs. I would like to be in the 700-800 hp range.

 

here ya go

http://www.messlerproducts.com/

 

A 76 would rock! No need to for two headaches go with an intermediate size single. That engine is big enough to spool a 76 with ease(leaves room to grow). If you are looking for only 700 a 66 with either an .82 or .96 housing at prolly 5 psi or so should get you there.

 

the only problem is that I already have an offenhauser 360 intake with dual 600 holleys. Anybody you know of make a bonnet for dual carbs? Are there any JY turbos that would do well on a twin or single setup of this size? Money is very tight right now. This motor makes peak HP at 6650 rpm if that helps any.

 

You're gonna have to spend a little to get the carbs ready for FI. You can't just throw on a bonnet and pressurize a carb. I'd take a look at other FI setups on here, then reasess your plan. That engine could take a beating why not use a little juice to get the power you want.

 

I kind of just want the turbos for the wow factor. I know I could use n20 but I have never owned a forced induction car and would like to try it out. Iknow I need to build the carbs for the turbos but what size twins should be used. Also FI is way out of the budget and I can fabricate most of the turbo setup. There are now inner fenders, heater core, ac, or power steering and the battery is in the trunk so I have plenty of room. Also how much boost do you think this engine could take on 110 octane? alcohol?

 

what is an affordable fuel injection that could deliver the power I will have. I know tbi won't handle it and everything else is pretty pricey.

 

personally i would just go w/ a victor jr. intake and a single holley double pumper for induction w/ the turbos. Its probably the most affordable and workable induction setup w/ the turbos. You could also use a regular single carb bonnet and either combine both turbo outlets w/ a ypipe into the bonnet or if youd be getting a custom intercooler made you could have one fabbed up w/ 2 inlets and one outlet.

check out turbomustangs.com's forums. they have a good carb'd turbo forum and some of those guys are making some insane numbers.

hope this helps a lil.

 

what about two t4s? maybe two t04e/b? would either of these work?

 

I have always been partial to the idea of a pair of stock GN turbos on a 454...

 

Does anyone know of a company that makes a carb bonnet like the one that vortech has?

 

vortech sells their bonnet separate if you want it..its not cheap though..and fuel line routing inside will look like a pretzel.

 

Sorry I meant FI as in forced induction. With the right tune at 10 psi that engine wouldn't bat an eye at it. It doesn't cost a lot to convert it to EFI. Have the manifold converted and use a factory ecm and harness(such as a syclone or regular tpi ecm). It will take a little more tuning to get the ecm to run the engine. but with turbos that'd be the only way. Sounds like you have a healthy $4K+ engine, don't go and try to put a $200 turbo system on it. You can use the carbs, but to get it right it will take a lot of trial and error changing jets to get the AFR correct. And the cost to convert them for a blow through system.

The turbo project can be handled by grabbing a set of 454SS manifolds and inverting them. Just have to get collectors welded on to mount the turbos, As far as getting the the fuel enrichment accurate while boost is coming on that's another story. Since you do not need to rev the engine you could go with two powerstroke turbos. They should be fairly efficient on such a large bore motor. And you won't have spin them to their max rpm to be efficient. Also they have more potential than the GN turbos.





Good luck !

 

I've got around $4K in it. The more i research the better a single turbo sounds. I would like to go with something like a t76. does each different company use the same names for the different sizes? I saw a tv81 on ebay. would that work? And I thought I heard not to use diesel turbos on gas motors. Or is my motor just big enough to spool it? Which powerstroke turbo and would I only need one?

 

Idea behind twin's is they will spool up a little quicker. So you should have less lag time. Since V-8s have 4 exhaust ports on each side it's easy to mount 2 turbos.

 

If you need a couple of Racegates, check the classified section. I'm selling mine

 

Here's my opinion and take it as just that. Every post you see says not to use diesel turbos. The people wanting to use the turbos usually have a very small V8 or a V6. These motors usually do not have enough exhaust volume to spool them. If indeed you are correct about your hp my guess is that it would take around 8 psi for you to hit your goals. You also have to take into account the cam, turbo motors do not a lot of cam. You'll make more power with the right cam and wrong turbo than the other way around. If you have a healthy cam in there now(240+@.050 etc.) that may hurt power production.

You should not have a problem spooling a powerstroke turbo with say an .82 housing with the 454. Like I said your main prob. will be tuning for fuel enrichment when boost comes on

 

Do you think I would only need one pwerstroke turbo. I thought I read somewhere that a guy was using two of these on a big block. And once the turbo goes in so is a new cam by the way.

Basically here is the list of what I have found that might work:

HT60 (cummins 855)
HT3B
Power Stroke-which years/model of turbo? single or twin?
VT50

which of these would work best? any other options or ones already on the list that should be marked off?

 

As far as turbos different manufacturers use different numbers to denote their turbos. If for instance the 60 you speak of is actually a 60mm compressor wheel except with the largest of turbines you'll prolly hit instant boost just off idle and blow the tires to hell unless you can hook it. Doing this will give you astronomical tourqe numbers but will hurt top end airflow and performance. A 76 would be a nice midle of the road if you can find one. I'd go with nothing less than an .82 housing. You'll have to look up the part numbers for the inducer and exducer sizes to get the trim and find out the how big it is. It will take some research, but again you'll be happier in the end. Can't just throw a turbo on there and expect true performance it could be way to big for the combo or so small that the only increase in powerband will be in a very short window(i.E. 1500 rpm) and become inefficient at higher engine speeds.