Dyno'd my 73 Z/28 last night
05-27-2006, 10:36 AM
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Dyno'd my 73 Z/28 last night Well I dyno'd my mystery motor in my 73 Z/28 last night.
It's a numbers matching block so it is a 350 but I have no idea of the compression, what cam it is, etc.....the only things I can tell are the obvious stuff, it's got 1.6 Summit Roller rockers, Weiand dual plane intake, Holley 750 vac secondary carb, HEI, headers, flex-a-lite fan. I put my 4L60E into it and the rear end has 4:11's
I dyno'd on a Mustang dyno (which generally read lower than a dynojet)
On 34* timing it made 217 RWHP / 226 RWTQ and with a 100 shot it made 283 RWHP / 317 RWTQ (also w/ 34* as I have no retard box).
Then we did a couple simulated 1/4 mile pulls and it ran 13.6 @ 100 on three different runs (Naturally aspirated). I have not run the car yet at the track so I can't say how close it is but another customer has run within a tenth of what is car actually runs. There is a link to the simulated 1/4 mile run of the guy I was speaking about at **non sponsor***, it's about halfway down the main page and the car left @ 5500 off the trans-brake. Maximum Performance is formerly SRA Transmission.
My dyno pulls are at:
http://www.tta89.net/cars/marc/73z/73zdyno.jpg
http://www.tta89.net/cars/marc/73z/100shotdynopull.jpg
Marc
It's a numbers matching block so it is a 350 but I have no idea of the compression, what cam it is, etc.....the only things I can tell are the obvious stuff, it's got 1.6 Summit Roller rockers, Weiand dual plane intake, Holley 750 vac secondary carb, HEI, headers, flex-a-lite fan. I put my 4L60E into it and the rear end has 4:11's
I dyno'd on a Mustang dyno (which generally read lower than a dynojet)
On 34* timing it made 217 RWHP / 226 RWTQ and with a 100 shot it made 283 RWHP / 317 RWTQ (also w/ 34* as I have no retard box).
Then we did a couple simulated 1/4 mile pulls and it ran 13.6 @ 100 on three different runs (Naturally aspirated). I have not run the car yet at the track so I can't say how close it is but another customer has run within a tenth of what is car actually runs. There is a link to the simulated 1/4 mile run of the guy I was speaking about at **non sponsor***, it's about halfway down the main page and the car left @ 5500 off the trans-brake. Maximum Performance is formerly SRA Transmission.
My dyno pulls are at:
http://www.tta89.net/cars/marc/73z/73zdyno.jpg
http://www.tta89.net/cars/marc/73z/100shotdynopull.jpg
Marc
Last edited by thechef; 05-28-2006 at 12:14 PM.
05-27-2006, 11:48 AM
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Hello Dave 
Yup, that is the plan......
It will just be on street tires but should be fun
I'm going to be racing my friends LS1 tonight at the street warrior event
Yup, that is the plan......
It will just be on street tires but should be fun
I'm going to be racing my friends LS1 tonight at the street warrior event
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05-28-2006, 07:56 AM
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Originally Posted by 2kt/a
did you get the shifter bracket tacked to the trans pan?
I called Tripple A and they towed the car down to SRA Transmission / Maximum Performance and when the guy shows up to tow it I told him that the car was going to Portsmouth Rhode Island and not Portsmouth NH and he's like "yea, I know I've towed your other car there before".....so I said OK then you know the drill, here's directions and heres $20 please take care of it
Guess the "Tomato" had a bit of a rep huh 
I just don't have time to work on cars much now that I have an infant daughter and didn't want the whole summer to go by so I sent it down SRA.
Marc
05-28-2006, 08:14 AM
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nice, when will you have it back. I look forward to seeing it on the road.
I expected it wouldn't be long once the shocks were in. The list was getting shorter and you seemed motivated.
-Scott
I expected it wouldn't be long once the shocks were in. The list was getting shorter and you seemed motivated.
-Scott