idibeast
Registered User
In response to some of you guys, my deffinition of high hp is 500+, not exactly daily driver but i dont think 150cc of fuel is gonna get you there.
big hp idi
- Thread starter idibeast
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Devon Harley
Full Access Member
You can run in-line an step away from db/pumps someone is gonna use around 300cc in a Idi drag truck soon I hear.
88 Ford
Full Access Member
I figured I would save you guys some reading. These are the idi head flew numbers directly from RacinNdrummin:
88 Ford
Full Access Member
Here is some more of the info posted by Justin:
racer30
Full Access Member
Hey IDIBeast, You need to say HP at the crank or at the road. The drive train loss in the truck can varry from 25% to 30% based on the wieght of the tire wheel combo, NBM2 had his drive train loss as per the dyno at 29% that put him at 466 crank HP on 136cc's of fuel. I was at the dyno when he pulled his runs and Got to ride in his Truck. To say it was impressive is a understatement. He spent alot of money on things that add power, the custom pipes and turbo mount was nicely done and the new cam made it posible to make the engine use the intercooled air better. The cryo treating dosent add power all the powder coating and paint too, but looks cool under the hood. I think 300 crank HP is possible with 90cc's of fuel, and the J2 cam and a good turbo. I hope to do just that with my build. 240 Wheel HP is 300 Crank HP at 25% loss and dirtydiesel did that with his build and a turnd up Turbo pump, several other trucks have put down about that with similar builds. Getting over 300 to the wheels will need a bigger pump like the DB4 Hybrid pump that will do 120cc up to 180cc and thats where the money is spent. Throwing 5000.00 at the engine would be nice, But IMO Its not a must. I will have about 2500.00 in my build and 500.00 of that was for parts to make it mate to my Allison trany in my Motor Home. I have traded and sold parts from 5 engines to get to this point so that helps alot. Its all about what you realy want under your hood. I hope to build myself a F250 IDI after I move to AZ in a year or so, I will go a bit more aggressive on that engine, Its nice to be able to build it slow with lots of time for trading and stuff, I would hate to have to build one in a hurry, it will triple the cost. Just my 2 cents on HP.
79jasper
Chickenhawk
Because our heads outflow the 6.0 heads. And Al asked for documentation of such.
As they should. 2v heads for a 444 cid motor and a set of 4v heads for a 365 cid motor. That's like comparing a 351 a 429 and being surprised. There is no comparison.
88 Ford
Full Access Member
A four valve head has to extra valves and the heads aren't on the block when they are tested, so cubic inches has no bearing on the test...
88 Ford
Full Access Member
Racin's numbers were a bit skewed cus his clutch was slipping and didn't load his clutch but if you take the dyno results from his dyno with the turbo cal IP and the numbers from NMB2's dyno, the horsepower per CC of fuel equals between 2.6-2.7. If you take the 180cc of fuel that Racin is at and multiply by 2.6cc/hp that equals 468hp. If you add nitrous to that, 500hp isn't out of the realm of possibility...
79jasper
Chickenhawk
That's what I was thinking. Thanks
umm no not even close. First off flow bench's have cylinders that simulate bore size otherwise the results are not usable. Second the 6.0 head was designed for a motor with a 365 cubic inches that means the ports and valve size were optimized for a small cubic inch motor that doesn't need much air. Just because it has 4 valves doesn't make it comparable. Cubic inches of each motor has every thing to do with this.
Thanks for those numbers I"ll be copy paste those ASAP to a file, have a guy look that stuff over and see if I can do something with that info.
And head to head with no regard to engine displacement, our heads do not too bad I would have thought that the 4v head should have done way better as they do make more power stock!
This says a tremendous amount to what can be eeked out of our engines with the correct combination of parts....up to the point of KaBoOm when all the magic smoke comes out and everything goes awry in a flash! That is the point a magic Genie needs to come round and grant ya 3 wishes!
And head to head with no regard to engine displacement, our heads do not too bad I would have thought that the 4v head should have done way better as they do make more power stock!
This says a tremendous amount to what can be eeked out of our engines with the correct combination of parts....up to the point of KaBoOm when all the magic smoke comes out and everything goes awry in a flash! That is the point a magic Genie needs to come round and grant ya 3 wishes!
Devon Harley
Full Access Member
Jared just shh you don't know what your talkin about lol jk man thanks for posting that for me.
88 Ford
Full Access Member
Granted I was being general and I know that valve size does have an affect on flow as well as being tuned to the engine but from what I read from those head numbers from the idi seem pretty good.
