Building a S̶t̶r̶o̶n̶g̶ ̶3̶5̶0̶ 383 for Frank the Tank…

Strictly Attitude said:
Awesome video glad to see your out enjoying the car
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Thanks! It was great fun and nice to spend the weekend with my father.. Big part of the reason I moved back to NZ.. The racing is a little stressful, as my cobbled together setup feels like it might come apart each time.. So far it's only been the cooling system (radiator leak, split hose) that has given way and sent me home... :rolleyes:
 
JimmyDuncan said:
There are likely issues with all systems at the moment...;) The fuel system being one of them..

Can you explain from the time slip what you can see that hints at the issue? And where the likely gains are?

Also, remember the gear changes were based on my RPM-guessometer... I have no data as to when I should change and no tachometer... lots of room for error..
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The 60 foot time is horrible at 2.0 some seconds.
But then again not because modern Corvettes do the the same without a skilled driver.
Old muslecars such as 1st gen Camaro or early 2nd Gen TA Can do 1.7 on plain jain street radial tires at $90 each.
I did in my 70 TA way back 1998.

1/8 mile is pretty strong.
Tells me the 383 makes pretty good Big Block Torque.
Around 800 feet Peak Hp present.
Frank is pulling good for a Big Tank.
Slows down at 1000 feet alot.
1320 13.999 had with real low mph trap speed.
Usually 100-102 mph trap speed required.

So Hp is decent.
More to be had.
Definately laid down.....Fuel issue and carb issues.
 
Maniacmechanic1 said:
Old musclecars you want to run 1/4 to 1/2 tank of gas running 1/4 mile stock fuel tank.
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I ran the 13.99 with a full to the brim fuel tank... Filled it up at the station about 10km away night before.. My gauge only drops to 1/4 then stops, so I keep it full as a precaution.. So, there's an easy 60-70lb saving there... :)
 
Maniacmechanic1 said:
Its been many years but I recall you should have 425 Hp Jimmy.
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Yes, I was shooting for 425-450hp at the flywheel... But, with the shambles of a build near the end and the unknowns, I've got no clue of the actual result.. I know there was none of the finer work done near the end, just because it was a rush.. So, not port matching etc.. The dyno tune I had done for free, showed about 285hp at the wheel on a dyno that bolts to the back axles.. Not sure what that equates to at the flywheel, but not close to 425-450 is my guess..? Maybe someone with dyno software skills can help me get a ballpark estimate of what I should have and that will highlight if I'm miles off potential..?
 
Loves302Chevy said:
Brian, what percentage did you knock out for his drivetrain? That's a difference of 44% !!!!
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I estimated HP Loss on the Low side since its a Turbo 350 Trans.
Between the TH350 & Chevy 12 bolt a 125 HP loss.

285 + 125 = 410 Hp.

It can be much higher actually the HP Loss.
150 - 200 HP Loss if the torque converter is real inefficient.

By the way a TH 400 uses just 10 HP more than a TH350.
 
Right.... Here are the plugs... please ignore my rough plug holding fixture... ;) They're NGK BCP5E S. They're set to a gap of .040" I put these in new on the Friday night before driving 1hr to the track, about 10 drag runs over the course of two days, then drove 1hr back.. Also, since started once, backed out of the garage and restarted and driven back in... The set of plugs that came out before these looked similar, but cruddier... They smell a little fuelie, but not really strong.. But, I don't really have much spark plug smelling experience... :rolleyes:

plug1.jpg plug2.jpg plug3.jpg plug4.jpg plug5.jpg plug6.jpg plug7.jpg
 
Super Fat Pig Rich Jimmy.
What carburator do you have ?

A Holley Vacuum Secondary 650-770 cfm ?

I am betting if so that Rubber diaphragm is shot like mine was.
Allowing fuel in from secondary side all the time.

Or Float setting wrong.
 
Maniacmechanic1 said:
Super Fat Pig Rich Jimmy.
What carburator do you have ?

A Holley Vacuum Secondary 650-770 cfm ?

I am betting if so that Rubber diaphragm is shot like mine was.
Allowing fuel in from secondary side all the time.

Or Float setting wrong.
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Oh ok..!

So, not oil..? Which would be a relief...

It's a 725cfm Holley with Vac Secondary. As I mentioned earlier the tuner that looked at it said the vacuum was a bit low for the 6.5 power valve.. Could that be it? It does smell the garage out if left to idle... I'll have a look at the rubber diaphragm over the weekend..

There is a wet fluid (oil or fuel) right down the threads.. is that normal..? If running rich.. Should any fluid get to the base of the threads?
 
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