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Re: realistic et goal for a 78 400
[Re: MPerry]
#1367658
01/14/13 12:35 PM
01/14/13 12:35 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
you need more
gear but use what you have...
I have another 3rd member with 4.30's on a strange spool if you think that is better. 
Set your gear ratio and tire size to determine your
trap rpm and set the conv to get your 60'(make sure
you figure the conv slippage in with the trap rpm)
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Re: realistic et goal for a 78 400
[Re: MPerry]
#1367661
01/14/13 12:59 PM
01/14/13 12:59 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
(make sure
you figure the conv slippage in with the trap rpm)
You just lost me! 
Just for a number lets say the conv has 10% slippage
you need to figure that 10% into the trap rpm if
you want a real trap rpm
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Re: realistic et goal for a 78 400
[Re: gregsdart]
#1367663
01/14/13 02:12 PM
01/14/13 02:12 PM
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Joined: Jan 2003
Posts: 11,657
Fitchburg,Massachusetts
MPerry
OP
Mopahts memba'
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OP
Mopahts memba'
Joined: Jan 2003
Posts: 11,657
Fitchburg,Massachusetts
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Quote:
[
I am not sure how well they will fit, but QUICKD100 had great success with a pair of Thermoquads on a Tunnelram Hemi. Might be a cheap alternative, and once dialed in, ought to run like scat!!! I am betting two tenths quicker than the best single plane deal.
What I like about this combo is the small preimarys for cruise, and vacuum secondary's providing as much air as the combo will need for max power.
As far as mounting, there is a way. Might need to get creative, but it can be done. I think I have two TQ to holley pattern adapters, and if you choose to try this combo, they are yours for the shipping.
A couple of swap meet carbs, two rebuild kits and some jets and you are in business.
I like that idea. I have a pair of TQ's and it seems like a cheap and cool plan. 
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Re: realistic et goal for a 78 400
[Re: MR_P_BODY]
#1367665
01/14/13 07:21 PM
01/14/13 07:21 PM
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Joined: Jan 2005
Posts: 1,260
Las Vegas NV
moparmanjames
pro stock
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pro stock
Joined: Jan 2005
Posts: 1,260
Las Vegas NV
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Quote:
Quote:
Well I'm going to give it a shot & find out. 12.50 or bust! 
I will be able to bracket race it either way.
do a pocket port on the heads you want to use...
thats real easy to do.... the conv will make a big
difference as well as the chassis set up... if your
looking to go 12.50 in the heat you need to make it
run 12.30 in good air and I'm sure some of these guys
are telling you the best they ran... you need more
gear but use what you have... the 509 might get close
with the porting... also do a match port to the
intake and heads... with your die grinder knock out
any chunks in the runners and just smooth up the
short turn on the heads... if you can have the heads
milled some to clean them and make them flat will
help... get the front of the car as loose as possible
so it lifts and get some rancho 9000 shocks for the
rear and I think you'll get there.... use your 850
carb
Good advice but make sure you use the 516's so you raise compression with the closed chamber heads. Use at least a 2.14 if not a 2.19 intake valve and open up the pocket accordingly.
Like he said just clean and polish the short side radius but try and open up the area a little on both sides of the valve guide boss.
Use those 4.30 gears and that thing should run great with the tunnel ram.
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Re: realistic et goal for a 78 400
[Re: gregsdart]
#1367666
01/14/13 08:14 PM
01/14/13 08:14 PM
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Joined: Aug 2003
Posts: 4,384
Madison Wi
NTOLERANCE
master
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master
Joined: Aug 2003
Posts: 4,384
Madison Wi
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Quote:
Quote:
Well I'm going to give it a shot & find out. 12.50 or bust!
I will be able to bracket race it either way.
I am not sure how well they will fit, but QUICKD100 had great success with a pair of Thermoquads on a Tunnelram Hemi. Might be a cheap alternative, and once dialed in, ought to run like scat!!! I am betting two tenths quicker than the best single plane deal.
What I like about this combo is the small preimarys for cruise, and vacuum secondary's providing as much air as the combo will need for max power.
As far as mounting, there is a way. Might need to get creative, but it can be done. I think I have two TQ to holley pattern adapters, and if you choose to try this combo, they are yours for the shipping.
A couple of swap meet carbs, two rebuild kits and some jets and you are in business.
Thats exactly what I am looking to do. I do have a pair of 450 holleys on my T-ram now, but would like to try the T-quad for the above mentioned reasons and the sheer wow factor.
How critical do you think it would be to have the same numbered carbs? SO long as the CFM is the same....or get the same numbers?
Sorry for the hijack.
I used to care but....... things have changed
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Re: realistic et goal for a 78 400
[Re: MPerry]
#1367671
01/15/13 02:42 PM
01/15/13 02:42 PM
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Joined: Jan 2003
Posts: 4,046
Minnesota
72blubird
master
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master
Joined: Jan 2003
Posts: 4,046
Minnesota
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Seems over double what you should be able to get a simple spacers for. If you want them search a little harder should be able to get spacers shipped for under $75
What was I thinking....
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