JSpeeedemon- Glad to here you like your setup. What are you using for a manifold/throttle body now. How do you have the intercooler plumbed now. If single setup then you would be able to use tomcat's intercooler & that would be some big HP inprovement.

If you have the hatch clearence i would...i assumed you ment a 250 BlowerShop unit with the 1050.

Jspeeddemon - Along the lines of Turbojack's question, did you keep the dual quad intake? I think the only reason that Procharger used a dual quad was to get four sets of fuel metering passages, air is easy. So a modern single plane design with big 4 barrel throttle body might be better; it is with carbs. Sell your intake along with the dual carb box and go to a single plane. It's only money, right?

Turbojack - thinking about EFI? I'm working on a design that would use your 504 intercooler laid on its 12" side, in between a single TB and the compressor discharge (M3 or V4). If you or jspeeddemon could measure this distance I can tell you if it will work with an M4.

Turbojack is right, converting from a remote intercooler with 3-4 elbows and a box, to a compressor discharge plenum with the intercooler integrated into the box, is worth about 13% more power. The primary reason is the improvement in air flow, the secondary reason is an improvement in cooling effectiveness.

Thirteen percent doesn't sound like much until you look at the numbers a different way. We figure the 454 we tested (NEVRENUFF) had about 425 HP with the dry dyno headers. The stock Procharger (M1) kit bumped this up to 654 HP, a very respectable 54% increase. But the improved Procharger kit delivered 743 HP, a 75% increase over stock HP.

The difference between the two kits was 89 HP, which is worth some real mph in a light single engine boat.

So Tom,

I can't resist asking.......

Just where do I get my hands on one of those "improvement" to the Procharger kit thingies!

I have some pictures to send you.

Back4more
yes , a blowershop 250/with 1050 dominator,anybody have experience with that set up?

JoeyO did a sawp out on some HP525SC's for the BlowerShop's 250 units.
Looks great, sounds great and runs even better.
Zoomnfun did the wenching....maybe I can find a pic.

Tomcat=what are you wanting me to measure? EFI's?? For my finishing my first year with carbs I am happy. This system is a lot better than the setup I had. I was going to let Jspeedeamon be the ginny pig & see if the system works good. He already has saved me $$$. I owe him. Lets see 980HP x 13% = 127HP or 1107hp. Bravo buster for sure.

Turbojack - I forgot you had the dual carbs, so I guess jspeeddemon has to measure, but only if he switched to a single plane with TB.

We took two engines to Tyler Crockets shop two weeks ago to have them dynoed. Mine is a 502 with custom ground roller cam Pro 1 aluminum heads SC1 procharger and the Merc. EFI off a 502 Mag.Running 5 lbs. boost it made 740hp at 5300 rpms and 740ft. lbs. torque at 4800. The other motor was a 502 mag with a little smaller cam done by Tyler and stock heads reworked by Tyler and a side mount Wipple Charger. It made 666 hp at 5300 and 757 ft. lbs. torque at 3200. I think if you run the efi the only way to be sure it is right is to run it on the dyno with someone who can reprogram the computer right there in their shop. After getting the fuel pressure and timing set Tyler took my motor from a sick 524 hp at 4600 to 740 at 5300 just by changing the computer with his laptop.It was well worth the trip from Virginia up there because I would have had a big ugly boat anchor if I tried to run it like it was.

Jspeeddemon,

Why did you change from the twin carb to fuel injection?
I know the 450's and Offenhouser intake isn't the best way to go but changing to FI is a pretty penny. Is it because you had idle problems, distribution problems, or another reason??

I had an M-4 on a single 800 with no idle problems and about 7lbs that brought me up to around 850 hp and it ran like a clock.

I just moved up to the M-5sc and twin 650's with a Dart tunnel ram. I expect it to run flawlessly.

DAVE