Crossfire Jet Boat
Crossfire... crossfirrreee!!!
Sooo, just dropped Vettezuki's Vette engine into my boat. (I heart you Ben.) Originally I was going to use my marine intake/ carb, but I started staring at the TBIs and I think I fell in love. Haha. But ya, I think I'd get better fuel economy and with a boat motor that is constantly at WOT at 3500 rpm under load, that can't be a bad thing. So I did some research. Unless I can find a crossfire ECM pigtail, I think my best option is to run a Camaro single TBI ECM, parallel wire the IACs and drill and tap the intake for an intake manifold temp sensor. Should work the same. So follow a long as I get further into this frankenboat. |
I know a great fabric wholesaler if you're thinking of re-carpeting the boat, I did my whole car for $9 would really up the look of everything
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Don't use the crossfire injection. Those intakes were terrible and had a lot of issue with puddling. If you want TBI get an intake off a late 80's truck instead. Also, you're not going to get any better MPG with the EFI than you will with a properly tuned carb.
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I have too agree, xfire was another GM fkup.
The simplest would be a carb. TBI's and TPI's require so many sensors and wiring that is prone to corrosion on a boat. And where do you put the oxygen sensor. Another thing is the intake ports on the GM intakes are lousy esp the xfire. |
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GM only used that POS on Corvette and non California F bodies for 2 years before tossing it. It was problematic. Junk it ! |
While obviously not a brilliant piece of engineering, I think the Xfire gets a little bit of a bad rap. I ran it for a couple years before going up to the LS and it was fine, zero troubles and it got decent street mpg (low 20s was the best I got when optimized). It's a good point that in a boat application where the engine is going to be running at a constant high throttle, a tuned carb would do just as well on fuel consumption.
If you want to go carb, I have a brand new Holly 750 (vacuum) with quick fuel meter blocks I got for the snake. That's still gonna be a little while and I want to go TBI when the time comes anyway, so it's available if you want. Though maybe a 750 is too much carb for that cam. :huh: |
I'm going crossfire. Im no stranger to tuning carbs and it is very difficult tuning a marine carb that wants to run with the butterflys open while the motor is horsepower limited to 3500 rpm. Bog city.
I'm sure I will get better gas mileage part throttle and at idle. And the boat will spend a lot of time at idle getting out of the marina. I plan to pick up a Camaro ECM/ pigtail/ IAT sensor next time pick your part has a half off sale. I'll bet I can get everything I need for about $60. :judge: |
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They have everything and sell it by the square yard. Place is awesome for any car buff, lots of stuff that they match to OE styles as well, place is a vintage porsche lovers dream
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