1970 mustang fastback

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Post  jgreene70 on October 30th 2010, 9:23 pm

Slip said 102mph.
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Post  richter69 on October 30th 2010, 9:38 pm

what are you using for a fuel pump? lines etc?
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Post  jgreene70 on October 30th 2010, 11:08 pm

Holley Blue pump, with the alumn 1/2 tubing for fuel lines going into the fuel log, then to the dominator.
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Post  richter69 on October 30th 2010, 11:22 pm

I happen to see the pic early in the thread is why I asked, it looked like a regular Holley regulator with just one side feeding the carb.................Combined with a single blue pump I cant see how that thing is getting the fuel it needs.

For starters I'd get a bigger pump and a better regulator.
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Post  jgreene70 on October 30th 2010, 11:38 pm

That may help. Idk for sure. Motor sounds good and doesn't seem to be acting like its starving. I know it could definately could use a pump and reg upgrade though. The guy that helped me build the motor and tranny was with me along with his car. See we built this combo for a heavier 1970 that I had before this one. It was full bodied and weighted 3450 with me in it. Thats why we set it up with the 1.98 planetary gears. This car is lighter but don't know by how much. Best guess right now is app 400lbs. It has fiberglass doors, hood, and trunk. Along with the tube chassis front end. Thats why we think the car may be gear bound just a little.

I thank you for all of your input richter on this build. I'm not sure what these motors are capable of but this motor is not much more than the FRPP crate motors that were rated at 630hp or something in that range. So there may just simply not be enough motor. Cuz my heads and intake are just straight out of the box and this setup started more as a street build and only has about a 10:1 comp and thats deff not helping me. I was going to send the heads to Charlie this winter to let him do his magic and get a cam from Lem but somethings came along and so I wont have the funds for that.
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Post  Tommyj466 on October 31st 2010, 8:44 am

Been awhile since I've been to LCD so not sure how mph traps compare. I went 6.46 @104.5 at Bluegrass Friday night with similar split times. If you don't already have a fuel pressure gauge, get one and verify pressure at top end. I had a fuel filter cause enough restriction to lay mine over on top and slow a tenth and a half. Again great looking ride!
TJ
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Post  richter69 on October 31st 2010, 10:56 am

what rpm is it turning at the traps?
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Post  jgreene70 on October 31st 2010, 11:08 am

6100-6200 rpm
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Post  richter69 on October 31st 2010, 11:27 am

I just dont think the gearing is the issue...........unless the converter is way loose which it doesn't appear to be from the trap rpm. The fuel system may or may not be the problem, but how it is now is marginal for a healthy smallblock in my book.

My setup at 3050#s on gas with similar gearing went 6.0's...................on injected alky in good air (2800' corrected) went 5.60 flat at 122...........31" tire, glide with 4.86 gear....approx 6900 rpm

I'd for sure upgrade the pump and regulator, and even if it does not help now a better build will be hurtin for more fuel supply.
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Post  jgreene70 on October 31st 2010, 12:02 pm

Thanks again richter. I'll check into the pump and reg. I have been wanting to get a better pump but funds have buckled down on me. What do you think about the Holley Hp 150. I had looked at that pump before. DO you think it will have enough to feed the engine sufficiantly. And what reg would you recomend?
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Post  richter69 on October 31st 2010, 12:10 pm

Get a Mallory 250 and a good return style regulator............or a big port Magnafuel deadhead style will be fine. You need to also have a good flowing filter between the cell and pump......the screen mesh type are the better IMO, make sure the cell has a -8 vent.
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Post  jgreene70 on October 31st 2010, 12:21 pm

Yes I have a vent on my cell. Thanks for the recomendations. I'm new to this and all help is welcome.
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1970 mustang fastback  - Page 2 Empty Pictures for AK

Post  jgreene70 on November 3rd 2010, 5:18 pm

Here are some rough pictures of the chassis per your request AK. Sorry they are a little dark because they were taken in the shop cuz its raining out today.
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Post  Tommyj466 on November 3rd 2010, 6:06 pm

Great Pics! Where is Albany? You should bring that car to the BBF Bash next year in Owensboro. You'll have a blast. You may have trouble making any passes for people looking at your ride!

TJ
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Post  jgreene70 on November 3rd 2010, 6:19 pm

I'm about 1 hr 20Min from Bowlin Green. I have heard other guys talk about the BBF bash but never new where it was. If I can get things lined out by next year with work and transportation I'd love to come. Thanks for the invite.
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Post  jgreene70 on December 6th 2010, 9:11 pm

Hey guys, things are getting a little tight so gonna be listing the motor out of my car. I'm having to keep up 2 places for work as I'm in a training program for the USACE and will hopefully get stationed back home at my permanent residence and be able to let this apartment go. Then HOPEFULLY when get feathered out later in 2011 I'll be able to build the A head motor I've always wanted. I'll post up when I get it listed.
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Post  cool40 on December 6th 2010, 10:11 pm

good looken car! boy she's low on the ground.headers anyway. Very Happy
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Post  jgreene70 on December 6th 2010, 10:13 pm

Just wanted to say thanks to all who have helped me by answering my silly questions and who have commented on the car.

THANKS GUYS!
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Post  72mav on December 7th 2010, 11:07 am

Nice car!
BTW, dont sell a lower compression short. You can do a pump-gas deal. Then you can build compression with the cam.
We have a member here doing around 800 HP in a 2600# car at 5.60's if I remember correctly.
Granter, higher compression would make thoings easier. But like I said it can be done with a properly selected cam.
Regards.
Al
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Post  valleydawg on December 7th 2010, 6:49 pm

Nice looking car!
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