CoalMiner_PSD
Green Horn
- Joined
- Jun 17, 2008
- Messages
- 70
Has anyone have any proof of a highley modded IDI that has decent hp for what it is?
Do they know what is done to the motor?
Do they know what is done to the motor?
My '86 6.9l was Dyno'd around the 300hp Mark. Its Bored, Banks Turbo'd, '94 IDI Turbo Injectors & IP, IP Turned Up, I forget what else was done to the engine. I'm Planning on doin the 6.2l Gov Spring, Thinkin a NOS Shot, and a Intercooler (With some special plumbing and features)
I think the neighbor has one right around 800!!!!!*nx*:umno:
Did you drop the compression ratio any when you bored it out? Seems some Mahle 19.5:1 ceramic coated pistons would do nicely on a truck built up like that. Course some '94 turbo idi rods would be a nice addition too. How much boost are you getting out of the banks?
Did you drop the compression ratio any when you bored it out? Seems some Mahle 19.5:1 ceramic coated pistons would do nicely on a truck built up like that. Course some '94 turbo idi rods would be a nice addition too. How much boost are you getting out of the banks?
alright thats good to know, Ill have to get some 7.3 turbo injectors, and a quidk shot, and i am thinking a port and polish since i have to take the heads off.
That should be a pretty good start. While doing all that get yourself some ARP studs for it, I think the kit is around $240 or something. Ford never learned their lesson on TTY head bolts :bang If you drop the compression with some pistons I think 19.5:1 is about as low as these motors like while still being daily drivers. Cold starts will start to really suffer as you get down around 17-18 and below.
Think idi can't make big horsepower?Back in the early 1990s, max Lagod of Hypermax put together an extraordinary engine package for a customer yearning to compete in sled pulling. With nothing holding him back, Lagod designed a 7.3L that included two Garrett turbos (which were state-of-the-art then but probably not manufactured anymore), a Bosch inline P-pump, custom injectors, a fabricated intake and exhaust manifolds, and slight cylinder head work.
Surprisingly, much of the factory engine components were retained, such as the crankshaft, block, and pistons-although the connecting rods were heat-treated. Compression on the engine was 15:1, which called for ether-assisted startups. Soon after entering this wild IDI into area-sanctioned sled pulling events, the engine was banned. Not to be discouraged, the owner turned to drag racing. Rumor has it that the truck graced with this 7.3L beast put out 1,200 hp and ran quarter-mile times in the 9-second range!
All of that power came with a price though, as the engine was infamous for its unreliability. Apparently, the engine block flexed so much on several occasions that the rear of the engine block broke off and required the utilization of rubber freeze plugs!