IDRIVEAG8GT

Ok guys, so I've got a plan for a 415 CID LS3 Block in the makes with a 10:5:1 compression ratio. There will be a TVS 1900 going on top of it with a 2.8" pulley. But this setup only makes roughly 10LBS with L92 Heads. I want to make more boost so I can achieve more than 700 HP. What should I do to increase it, because I'm stuck going with a S/C. Is it in heads? Or cam?

Thanks,
Robbie.

HydroStream6

iTrader: (16)

You're money would probably be best spent upgrading to a 2300. 415 is a lotta cubes.

lt1773

iTrader: (1)

TVS2300 will be the best choice for that kind of big cubic inches

Bob@BruteSpeed

iTrader: (16)

You could make more boost by going to heads that flow less, but your horsepower will more than likely go down. Your camshaft profile doesn't show the lsa but the lift and duration are not huge. Your question, is it in the heads or cam, to me is answered with a no. As has been mentioned, you're not going to make a lot of boost with a 1900 with your cubes.

How much boost the blower can produce depends on many variables.
* Cubic inch. The larger the engine the less boost it will make with a supercharger.
* Headers and exhaust. A better flowing system will produce less boost, requires a smaller pulley to regain the loss in boost. Ultimately though, more power will be gained.
* Camshaft and heads. A camshaft with some overlap will leak out some boost through the valves. Better flowing heads react a lot like a better flowing exhaust system.
* Altitude. Elevation plays a big part in how much boost is produced. Those people living in the higher elevations have to spin the blower harder to see boost.
* Condition of engine. An engine with real good sealing rings will ultimately produce more boost than one with worn rings.
* Rpm. An engine that is spun up higher in the rpm range will normally produce more boost.

Bob

IDRIVEAG8GT

I'm building a custom engine. And I already have an MP1900 sitting here that came off a 6.0L. The cam for this engine, (Not the one in my sig) is a ZR1 cam but that can be changed if it meets the needs of being streetable and has a wide power range, like from 1900 to 6500. The heads I have are CNC/Ported L92's. On the shortblock build, I'm studding the heads and running LS9 Gaskets. I watched a video of Granatelli's 402 smallblock with the same compression, an MP122HH @13Lbs, and trickflow heads build 725HP, and 759TQ. I figure if I can achieve the same specs with more cubes I should make ~750HP or more. What do you guys think?

HydroStream6

iTrader: (16)

I think you'd be better off building a cheaper shortblock and spend the saved money on upgrading from the 1900 to the 2300. Maybe they have a trade in plan?

I think you can make 750hp at the motor with a 400+ cube motor and the 1900, but I doubt it'll do that to the wheels. Either way you'll be maxed out. I'm betting a cheaper 370 with the 2300 and better heads would make more power. Is money an issue? Do you already have the LS3 block?

I'd just hate to see you starving a nasty 400+ cube motor with the smaller 1900 blower.

IDRIVEAG8GT

I wish they had a trade in or else that would be numero uno on my list lol. Isn't the 122 smaller than the 1900 anyways? Yes money is an issue because I don't have there isn't enough to get a 2300 maybe later after I get this built and straightened out I'll do it but my 415 shortblock is already on order and being built. Right now I'm just trying to make the most of what I've got, but I might be able to afford a cam with this job and maybe more work on these heads. But a 2300 for a truck... I don't have that much to spare at the moment. I'm doing all the tuning myself and I dint want to push over 800 at the flywheel because I think that that is all the aluminum blocks can handle.

IDRIVEAG8GT

I'd like for some cam specs to look at with no more then .610 lift though. Also any tricks on the heads? Or better yet can I make this Maggie perform better? I can go down to a 2.7 wheel but I might risk belt slip. Or is there an overdrive pulley that someone manufactures? Any ideas like that?

IDRIVEAG8GT

I also forgot to mention that this truck has custom 1 3/4 inch one off headerrs, stock cats, and true dual 3 inch pipes into a magnaflow exhaust, exiting out with two 2 1/2 inch over axle tips. The reason I chose 10:5:1 compression was to accommodate upwards of 7 psi of boost to make power. I went heavy duty on the head gaskets and decided to do studs so later on I could put more boost to this engine. Thanks Bob for all info you posted.

IDRIVEAG8GT

Sorry for all the extra posts. I'm doing it off my Blackberry and I keep leaving things out, but there's no way to go back and re-edit the previous post. Anywho I really know you guys want me to go with a bigger Supercharger but I just don't have that much dough right now. I'm stuck with what's coming and its exactly what I want for an engine. Regardless its going to make big horsepower though.... Right? and as soon as this truck gets out of the shop and makes me a little money I WILL end up going with a bigger charger.

IDRIVEAG8GT

Anyone else out there have any comments or suggestions?

turbo iroc

iTrader: (1)

Maybe sell the blower and headers and go turbo. Probably be cheaper than buying a bigger blower.

IDRIVEAG8GT

True. Thanks for the input.

Bob@BruteSpeed

iTrader: (16)

HP Turbo is in your hometown, just don't pay them 100% upfront for a turbo system. Bob

IDRIVEAG8GT

Cool thanks guys. I never really even considered turbocharging.... I just like the low end torque and instant power of an S/C.