You tell Randy, vacuum is vacuum, the engine produces what it does, all a leak does is draw air in created by the vacuum. thus a leak. lol
Hesitation / Stumbling, runs rich at idle
- Thread starter Dan the man
- Start date
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Oh and Randy are you the guy that had a 150 hp radiator? I knew a couple Chevy guys like you
I am. He sent me a couple more texts messages but I didn't answer him.
He is, not me
Yea I was talking about your friend Randy, how old is he?
oh. well, then thanks for relaying his message. i appreciate somebody i don't know and probably doesn't exist telling me i don't know ****.
Did Randy get an aftermarket camshaft cut for it? That is the whole program on how it's going to run.
Too much cam can be a stumbling block for hot rodders, especially on a V6.
Stock Grind 4.3 262 cu. in. V6 camshaft: (and that is stock for Throttle Body Injection engine)
Imagine a Carburated V6 camshaft is going to be ground differently.
Lift intake .350
Lift exhaust .385
Duration in. 262
Duration ex, 262
Would be interesting to hear what his 4.3 cam grind specs are, and how far up the rpm band it goes before making power?
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Too much cam can be a stumbling block for hot rodders, especially on a V6.
Stock Grind 4.3 262 cu. in. V6 camshaft: (and that is stock for Throttle Body Injection engine)
Imagine a Carburated V6 camshaft is going to be ground differently.
Lift intake .350
Lift exhaust .385
Duration in. 262
Duration ex, 262
Would be interesting to hear what his 4.3 cam grind specs are, and how far up the rpm band it goes before making power?
* * * * *
Last edited:
I'm be honest with you junkyardhero, Randy does exist. You've helped me out a few times and I know that you know your stuff.
He got the biggest cam that was offered in the 4.3's from the factory. It's a hydraulic roller and the engine he has was fuel injected from the factory.
340six
King Of Bling
mopar head
DoD nuisance Alien/Squatch extermination team
I curious what year engine, computer controlled? utilized computer? computer-controlled ignition/ timing? or did he do away with all that and went old school?
OK, so he is running the factory GM 4.3 fuel injection roller cam on a carburetor setup.
That 4.3 injection had a high pressure in the tank fuel pump.
So what (pressure) is he using for a fuel pump now with the carb setup? Only needs 6 psi.
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A couple of months ago he texted me the cam specs and I have them wrote down, why I did that I don't know
4.3 V6 Engines
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'95 Blazer 4.3 V6
Roller camshaft (with balance shaft)
Lift:
.432 in.
.444 ex.
Duration:
277 in.
274 ex.
Same camshaft grind numbers as the Mopar 340 cam.
Good Numbers
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Roller camshaft (with balance shaft)
Lift:
.432 in.
.444 ex.
Duration:
277 in.
274 ex.
Same camshaft grind numbers as the Mopar 340 cam.
Good Numbers
* * * * *
I believe that those are the same lift numbers that he texted me. I'll check tomorrow.
This question is for me and not him. Can a cam that's ground for a fuel injection engine be used in a engine that was converted to a carburetor?
Vacuum leak at the carb base or the intake manifold it's self?'
don't ask me, i'm not there and i don't know my *** from hole in the ground, evidently.
Well here is living proof that it can.
1989 318 Throttle Body Injection, converted to 4 bbl. using same stock TBI roller cam.
Working well, starts and runs great with the Mopar HEI conversion and E-core coil.
Fortunately it had the fuel pump eccentric in the timing cover behind the block off plate, to run the mechanical factory mopar fuel pump.
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I'm just guessing. He wouldn't listen anyway. I know that you know what you're talking about. I'd be willing to bet that he won't have it running before the end of the year or he'll give up and sell it.
Just reading back and wondering if both of your test carbs are just dumping too much fuel into that V6?
Here is one of my favorite 2 barrel Stromberg carbs, that I bet would run great on there. Has run great on everything I have tried it on so far.
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Other 2 barrel options on upper left.
350 cfm ^
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Here is one of my favorite 2 barrel Stromberg carbs, that I bet would run great on there. Has run great on everything I have tried it on so far.
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Other 2 barrel options on upper left.
350 cfm ^
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