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Hi I was curious if anyone may have an educated estimate of what my HP may be around with the upgrades that were done to the car. Car was bought like this and came with the receipts. Easier for me to just post the pics of the machine work and upgrades.
without knowing at least compression, cam and piston specs, would not appear an accurate power output can be evaluated. Thus far looks like a standard rebuild effort with upgraded intake and headers, not clear how much cylinders bored (presume up to .030). Also, appears you reused your stock 7a heads and nothing more than a (very) basic rebuild to them.
Others will likely respond with further thoughts, but my guess is not much of a bump from stock HP level.
Last edited by 70sgeek; October 5th, 2020 at 04:37 AM.
No notes about a new cam. If you're running the stock cam, then maaaaybe 20hp from the intake and headers. The carb may, or may not, be set up correctly, so you're likely to get a much bigger difference by tuning the carb.
It looks like a quality rebuild was done. I noticed BHJ Tru Bore was used and positive seals were added. As said, what pistons and cam were used is absolutely key in the power the engine makes.
The master engine kit that includes pistons concerns me. Most of those kits use cast pistons with HUGE 24cc dishes that are too short on compression height, which results in around 7:1 compression ratio.
So find out EXACTLY which pistons were used in the rebuild. Without that info, it's anyone's guess as to the CR and power output.
Last edited by Fun71; October 5th, 2020 at 07:11 PM.
It looks like a pretty thorough rebuild ,'one would think" the engine builder would try to keep the compression ratio at least stock.Being that it was squared and decked and the heads surfaced that could make up for a thicker head gasket assuming one was used .Knowing what piston was used would be a huge help.Just to many unknowns here for an educated guess. I'm curious if this motor was run after the build, and how long ago it was rebuilt. Good luck with your install and let us know how she runs. If it puts a smile on your face who cares what the hp is
As far as I know so far the rebuild was in 2010 and it was used at a race track a few times. Its only had about 4k miles on it after the rebuild. Ill see if I can find out what pistons and cam amd stuff was used. I know the motor came stock with a 2 barrel and is now a 4 barrel
if a typical standard performance 'engine kit' was used try to find out what vendor it was sourced from - that may provide some missing links as well if you can't otherwise get exact individual component specs info
still looking like a standard level rebuild (albeit reasonably thorough) effort by what you've provided, and the only variables offering potential performance upgrades are the 4-bbl conversion and headers.
Last edited by 70sgeek; October 5th, 2020 at 06:48 PM.
Ok so we know for sure your engine started life as the base 350 code H, here are the codes and the factory ratings including each major factory modification.
H = 350-2bbl V8 160hp J = 350-2bbl V8 175 hp (dual exh.) K = 350-4bbl V8 180 hp M = 350-4bbl V8 200 hp (dual exh.)
If we are talking automatic transmission, the camshaft is the same for all 4 versions of 350.
Originally Posted by deathvader
Hi I was curious if anyone may have an educated estimate of what my HP may be around with the upgrades that were done to the car. Car was bought like this and came with the receipts.
Originally Posted by deathvader
As far as I know so far the rebuild was in 2010 and it was used at a race track a few times. Its only had about 4k miles on it after the rebuild.
It would be great if those receipts/paperwork included timeslip information and we know the exact setup he ran the car with at the track. If the car was setup for high performance efficiency we can get a good idea of your power output from the numbers. Assuming he wrung the car out.
The master engine kit that includes pistons concerns me. Most of those kits use cast pistons with HUGE 24cc dishes that are too short on compression height, which results in around 7:1 compression ratio.
So find out EXACTLY which pistons were used in the rebuild. Without that info, it's anyone's guess as to the CR and power output.
Doing some detective work, I came up with some specs but of course without verification it must be taken with a grain of salt. I basically bombarded the search engine with numbers and codes taken from provided info and came up with what I consider a reasonable result... Anyway here goes...
Pistons 332AP $18.92 Sealed Power Pistons (x8) (Rec.Head .215"deep x 2.920"dia.7.9:1 Cr.)
Got the motor painted up gonna look good with the flat black. Anyone know where I can fine a flat black valve covers and air filter with red 350 decal or rocket decal
Looks good. Another good way to find out what piston is in the motor is a bore scope. Should be easy to tell on an unfired motor. They did upgrades like a cam and high volume oil pump, they may have upgraded pistons as well.
I had a chrome one like that too. Depending on your hood you may have clearance problems. I needed to go to a drop base cleaner to run the thicker filter.
got a new holley carb due to unexpected problems with the other. Got the motor tuned up and sounds great now. Cant wait to get it back out on the road.
I had one of those carbs back in the mid-80s. After many dollars for Holley tuning parts and time installing/optimizing, I finally got it to launch as well as the QuadraJet. Then I took a road trip and got 10 MPG on the highway (QJet was getting 12 around town/ 16+ highway) so I gave the Holley to a friend, reinstalled the QJet, and regained the MPG I had lost and maintained the same level of performance.
I had one of those carbs back in the mid-80s. After many dollars for Holley tuning parts and time installing/optimizing, I finally got it to launch as well as the QuadraJet. Then I took a road trip and got 10 MPG on the highway (QJet was getting 12 around town/ 16+ highway) so I gave the Holley to a friend, reinstalled the QJet, and regained the MPG I had lost and maintained the same level of performance.
Bull! No way the Quardra-bog, Quadra-Junk, Quadra-whatever outperforms the Almighty Holley carb!!!
Just kidding. Anyone who has been a member here for very long knows of my fondness of the Q-Jet. Besides, no other carb can provide that glorious scream when standing on the loud pedal!
With 219º duration @ .050” lift I wouldn’t call it an RV style cam; those are typically around 204º. Keep in mind the factory cam was 186* @ .050” lift so the Comp is significantly more aggressive. It’s slightly more duration than the cam in my engine, and I had to do some work to get the idle vacuum up so the power brakes worked right.
Last edited by Fun71; October 27th, 2020 at 08:54 AM.
Cam looks to be somewhere between the basic stick cam and the Rallye 350 stick cam.
Stick Cam 262/274 .440/.440
Rallye stick cam 286/286 .472/.472 ( This 350 can turn safely to 5600 - 5800 RPM (Motor Trend 1970))
The Rallye 350 4 speed tested at 94 MPH back in the day with a 3.42 rear. Probably made around 270 HP flywheel net. No headers but was high compression with outside air induction.
So i'm guessing this comp cam rebuild is around 300 HP on an engine dyno (gross). 260 HP at the flywheel (net). While this engine was born with 160 HP flywheel net.
October 5th, 2020, 02:08 AM
