460 advise.

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460 advise.

Post  MiamiSC on October 19th 2013, 5:01 am

Hey guys, Im going to be putting a 460 into my ford tbird pretty soon, I want to know if I should change anything on my build or If its worth keeping some of the parts I have or upgrading them.

460 with forged pistons 30 over L-2443, 10.5 to 1 compression, football head rods, .600 solid lifter cam, SCJ heads (Just cleaned, shaved and valve job), two old school holley's 700 (just rebuilt), c6 transmission with trans-go shift kit (just rebuilt) and 10 inch converter, offenhausser turbo thrust 360 manifold, hooker long tube headers, old school moroso electric water pump. This is all going on a 4000 lb car, hoping to run low 11's. Is this attainable with this combo? What do you guys recommend I do different? No real experience with carbbed cars. The engine has been sitting for a few years but turns freely, the cylinders still have the hone marks, the previous owner told me it has about 100 race miles. I also poured gas inside the cylinders and the gas didnt drain for a while which means the rings should be good right?

Thanks in advance.

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Re: 460 advise.

Post  dfree383 on October 19th 2013, 5:27 am

With Iron SCJ heads and those pistons you are going to be more than 13.5:1 Compression.
 
I'd also ditch the TR and run a 4500 Victor and a 1050 dominator.
 
Your also going to need some gearing and a pretty loose convertor.
 
you may also have some issues with those headers, the 1990 TB's are not a fox body car.
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Re: 460 advise.

Post  MiamiSC on October 19th 2013, 5:38 am

Thanks for the prompt reply. This combo was previously Installed in a mercury cougar xr7 (same as tbird sc) except the headers which are new. I have to modify the driver's side header. The previous owner told me the compression was 10.5 to 1, is there a way to find out what compression ratio I have?

Sorry but what do you mean by TR?, gears will be Cobra IRS Pumpkin with 3.55 gears too low?, Ill find out what stall the converter is. Thanks for your help!

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Re: 460 advise.

Post  dfree383 on October 19th 2013, 5:43 am

Tunnel Ram = TR
 
3.55 isn't enough gear IMO 4.10's qould be a good start.
 
What casting number heads do you have and have the domes been cut off the pistons?
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Re: 460 advise.

Post  MiamiSC on October 19th 2013, 5:45 am

Ok thanks, Head casting is DO0E-R, Not sure on the pistons Ill post some pictures now.

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Re: 460 advise.

Post  dfree383 on October 19th 2013, 5:50 am

Factory DOOE-R heads and the pistons you have listed (if they have not had the domes removed) will be in the 13.5:1+ range.

If the domes are off it will be in the 11.5:1 range.
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Re: 460 advise.

Post  MiamiSC on October 19th 2013, 5:52 am

Ok sounds good, will i be able to run 93 octane with 13.5 to 1?

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Re: 460 advise.

Post  dfree383 on October 19th 2013, 5:54 am

MiamiSC wrote:Ok sounds good, will i be able to run 93 octane with 13.5 to 1?
 
No, it will detonate, need some race gas.
 
E85 would be an option if you have it avaliable in your area.
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Re: 460 advise.

Post  MiamiSC on October 19th 2013, 5:58 am

Crap that would really suck, e85 not really available close to me that I know of. I would like to drive this thing around the street, the nearest track is like 1.5 hours away.

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Re: 460 advise.

Post  MiamiSC on October 19th 2013, 6:10 am

Picture of piston with fuel on it.
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Re: 460 advise.

Post  MiamiSC on October 19th 2013, 6:21 am

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The torque converter has a nick on the shaft, thinking of filing it down, shouldn't affect it right?. Also would you use this accel distributor? Or is it too relic?

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Re: 460 advise.

Post  dfree383 on October 19th 2013, 7:21 am

You are going to be over 13.5:1......
 
The convertor may be usable... but make damn sure not to get any metal in it while cleaning it up.
 
You have 2 different carbs, one is a 3310 750 Vac and the other appears to be a a 3310 750 Vac with a metering block added, You need to rethink your use of those.
 
I wouldn't use and old accel, better off finding a ford duraspark, recurving or locking it out and using a 6al MSD Box.
 
Whats with the marks in the cylinder? is it just water or dings?
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Re: 460 advise.

Post  MiamiSC on October 19th 2013, 7:43 am

crap.. i guess e85 it is, should make more power than with 93 right?.. I told the shop who rebuilt the carbs that they looked different because one has that "hat" cut off. he told me they were both 700 Rolling Eyes . I paid $300 to get them rebuilt, think I could get that money back by selling them? I wasnt really looking forward to tuning two carbs and dealing with linkages for both anyways.

Marks on the cylinders is fuel drops.

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Re: 460 advise.

Post  maverick on October 19th 2013, 9:14 am

You might take some good measurements in those cylinders just to assure yourself that they're still sorta round. The gas drip test isn't really reliable...and "100 race miles" Suspect could mean a buttload of 1/8 mile passes. Some careful checking now might avoid later disappointment.
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Re: 460 advise.

Post  MiamiSC on October 19th 2013, 9:19 am

Lol Yea I know what you mean.. I didn't feel any scores on the cylinders, the crosshatching looks pretty good at least.

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Re: 460 advise.

Post  dfree383 on October 19th 2013, 9:32 am

MiamiSC wrote:crap.. i guess e85 it is, should make more power than with 93 right?.. I told the shop who rebuilt the carbs that they looked different because one has that "hat" cut off. he told me they were both 700 Rolling Eyes . I paid $300 to get them rebuilt, think I could get that money back by selling them? I wasnt really looking forward to tuning two carbs and dealing with linkages for both anyways.

Marks on the cylinders is fuel drops.
Its not the power it will make on E85 vs 93..... it will kill itself at that compression on 93, It will detonate itself to death.

You should be able to get by on E85 at that compression.

You could remove the domes and get by with a race gas / 93 50-50 mix. Get the compression down in the 11.5:1 range.

Or get some dished pistons to get it down in the 10:1 range so you can run 93 pump gas.
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Re: 460 advise.

Post  MiamiSC on October 19th 2013, 11:05 am

I'll just leave the pistons as is and run e85. Is the victor manifold better than the weiand stealth? I also have the original iron scj manifold but that thing prolly flows less than the victor or weiand.

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Re: 460 advise.

Post  dfree383 on October 19th 2013, 11:14 am

MiamiSC wrote:I'll just leave the pistons as is and run e85. Is the victor manifold better than the weiand stealth? I also have the original iron scj manifold but that thing prolly flows less than the victor or weiand.
Yes with a loose convertor and some gear the victor will be faster.
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Re: 460 advise.

Post  MiamiSC on October 19th 2013, 11:16 am

How loose like 3600?

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Re: 460 advise.

Post  dfree383 on October 19th 2013, 1:32 pm

Depends on the cam and gearing you end up with.
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Re: 460 advise.

Post  Paul Kane on October 19th 2013, 2:15 pm

MiamiSC wrote:Picture of piston with fuel on it.
The piston dome looks to have already been milled away, piston top milled flat. If so, then depending on other details your compression ratio will be between 11.6-11.9:1.

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Re: 460 advise.

Post  MiamiSC on October 19th 2013, 10:50 pm

Ok so that's better news if I could run 50/50 e85 and 93. Do I have to change anything on the carb to run e85?

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Re: 460 advise.

Post  dfree383 on October 19th 2013, 10:57 pm

No mix of race gas and pump gas or e85. You you will need to get a carb set up to run e85.
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Re: 460 advise.

Post  MiamiSC on October 19th 2013, 11:06 pm

So if I convert to an e85 carb does it only run e85 after that or I could run race fuel through it?

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Re: 460 advise.

Post  dfree383 on October 20th 2013, 12:13 am

MiamiSC wrote:So if I convert to an e85 carb does it only run e85 after that or I could run race fuel through it?
E85 only. The metering is different for ethanol vs strait gas.
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