High HP dyno charts?
Thread Starter
Staging Lane
Joined: Oct 2005
Posts: 73
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High HP dyno charts? I am looking for some high HP dyno charts from various sized engines and combinations. I am most interested in a 700 whp+ 346-370 ci engine, but bigger ones would be interesting too. The application I will be putting an LSx engine into will be limited for torque by the transmission, so I am looking for something with lower torque, high HP, but not super laggy on the turbo end. I am looking at 4" bore with a 3.622 stroke, a big cam and twin 67mm turbo's. I definately need more data before deciding on a setup though, and I can't find any high HP non-nitrous dyno sheets that show torque, especially for smaller cube engines.
http://psj.ls1tech.com/gallery/main....&g2_itemId=664
No torque reading on that one sorry...
-348ci
-8.25:1
-730-754rwhp
-I recall seeing like 700 tq on one pull
No torque reading on that one sorry...
-348ci
-8.25:1
-730-754rwhp
-I recall seeing like 700 tq on one pull
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Thread Starter
Staging Lane
Joined: Oct 2005
Posts: 73
Likes: 0
It will be a Mendeola transmission rated at 650 ft/lbs. This is a non-GM application. Lets just say the twin turbo LS2 will be powering a 2400 lb car. I am purposely going a bit big on the turbo's to add a little lag. They will also make more power though because the air will be cooler. This is a mid engine car, so I am not going to be able to run a big FMIC. It will be either twin side mounts or air to water.
Anyway, I want 800 - 1000 whp, but limit the torque to 750 ft/lbs max. This car will be lighter, so the tranny should handle some extra torque.
That is why I want to dyno charts, to see what combinations make good top end power, but limit the torque. I have also been thinking of going with a short stroke engine. Lunati goes all the way down to 3.2". I will probably use the new World block that is coming out, then I should be able to do a 4.125" bore with 7.5:1 compression (again purposely on the low side).
Anyway, I want 800 - 1000 whp, but limit the torque to 750 ft/lbs max. This car will be lighter, so the tranny should handle some extra torque.
That is why I want to dyno charts, to see what combinations make good top end power, but limit the torque. I have also been thinking of going with a short stroke engine. Lunati goes all the way down to 3.2". I will probably use the new World block that is coming out, then I should be able to do a 4.125" bore with 7.5:1 compression (again purposely on the low side).
Easiest way would be twin 61's with big A/R's, big duration cam and a nice 112LS. That will shift the curve way to the right and keep the torque numbers down. No sense in going with huge 67's with such a small cube motor. Twin 61's with 1+ A/R ratios will do the trick.
TECH Addict
Joined: Aug 2004
Posts: 2,866
Likes: 4
hmmmmmmmm, JETmn, so what car is it your putting it in? its not an Ultima GTR is it??? if it is ace! i have wanted to see someone build a twin turbo lsx for one of these for ages!
take a look at wheel to wheel. they have a LS1 thats running close to 1500bhp i think, but thats on an iron block, but you should be able to get 1000bhp out of an ally. also they are building a twin supercharged 402 ls2 thats making close to 1000bhp already! and their using twin rotex centrifugal blowers so the torque should be lower but still with a strong to end!
i have also sent you a PM about the 'box!
thanks CHris.
PS hope you keep us all updated. sounds a very intresting project!!!!
take a look at wheel to wheel. they have a LS1 thats running close to 1500bhp i think, but thats on an iron block, but you should be able to get 1000bhp out of an ally. also they are building a twin supercharged 402 ls2 thats making close to 1000bhp already! and their using twin rotex centrifugal blowers so the torque should be lower but still with a strong to end!
i have also sent you a PM about the 'box!
thanks CHris.
PS hope you keep us all updated. sounds a very intresting project!!!!
Thread Starter
Staging Lane
Joined: Oct 2005
Posts: 73
Likes: 0
smokin hawk, that is what I am planning on doing with the new World block coming out.
GTB that is about exactly what I am looking for! Do you have a link to your mod list? What is on the right axes? I am guessing you didn't make 2,700 ft/lbs of torque
JZ - I know the 61's would get me to 800 whp easily, they will starting to get taxed at the 1k mark, which I may eventually go for. I will be running pretty high boost with the low compression. I haven't actually thrown the numbers on a compression map yet because I am still up in the air about the engine. I have a 61 on my current car and really like it. 498 whp at 25 psi on a 2.4l 4 cylinder.
chunt - it is going into a car similar to a Ultima
GTB that is about exactly what I am looking for! Do you have a link to your mod list? What is on the right axes? I am guessing you didn't make 2,700 ft/lbs of torque
JZ - I know the 61's would get me to 800 whp easily, they will starting to get taxed at the 1k mark, which I may eventually go for. I will be running pretty high boost with the low compression. I haven't actually thrown the numbers on a compression map yet because I am still up in the air about the engine. I have a 61 on my current car and really like it. 498 whp at 25 psi on a 2.4l 4 cylinder.
chunt - it is going into a car similar to a Ultima
If you plan to exceed 1000, then go 63's, or custom 62's. We have a 62mm wheel that will darn near flow close to 82lbs/min. They are much taller though but we may could fit them in a small chassis unit. They make alot of dang noise though.... 
Originally Posted by JETmn
smokin hawk, that is what I am planning on doing with the new World block coming out.
how far are you along with yourultima, should be a sweet project, good luck.
