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Old 07-15-2012, 03:48 PM
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350 with 305 heads and rv cam ????

Hey all ive been creepin the msg board for sum time and have got a lot of excellent info from you all.... I have an 85 buick regal with original paint, excellent body and frame, i put a 200 4r tranny in it with a trans go shift kit in it , 373 rear end gears from a 00 s 10 and a posi unit from a monte carlo ss, still the 10 bolt... i also got a olds cutlass off some one and it had a rebuilt 1982 350 with 305 heads and a rv cam in it. I have installed this into my buick. My question is what can i do to upgrade.... ? When i installed the engine i used my original intake and carb from my 305 in order to keep all the pollution **** intact. I have 275 60 15s on it and if i put her in 2nd and brake stand it then let off the brake in 2 nd at about 4000 rpm it will put a good strip of rubber down. It seems to fall on its face around 4200 rpm.... now from what ive found on line its around 10 to 1 compression .? Im wondering if the vortec heads with the ghetto grind and home port job with a aftermarket intake with egr friggn plumbing and a nice 650 carb is a good upgrade ? because i think it will be trading off the compression for better and more efficient flow ..... im a licenced autoservice tech and this older school stuff is giving my brain a work out. Also wondering if maybe the quadra bog just needs tuned butter on this 350 set up as its off the 305 ????

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Old 07-15-2012, 05:45 PM
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Those 305 heads are done by 4500rpm. The 420/442 lift cam works with low compression. It does not cost low end , but adds a little power 3500 to 5200. The vortec heads require no work, and will cost no low end. They will gain you above 3000 rpm nicely. Reprogram the govenor to shift about 5200. The Qjet and a dual plane intake will give a performing boost over stock. When keeping the low end thrust you cannot really say its is a bad combo in a full size street car. 3.73 gears are good. A liveable 2400-3200 stall is a good idea. It will be fun , enjoy even if its no racecar. A qjet is a great street carb, next would be the new AVS type. If you know what your doing the Holleys DP really shine at the track, but not my first street choice.

Big heads and a 268-274xe cams are nice but operate in a different range. They will dog out the low end. Unless you build to compensate in the package.

My first hot rod a 70 cuda 440 had a 509 cam, and I left the stock pistons in. They were only about .080 in the hole. With 906 440 heads and 410 gear, 3000 stall it was doggy from the line. The compression was too low. Terrible launching , but had the top end. A 70 Grand coupe cuda with the overhead console. It was cool. I miss it. Ran a 13 flat, and thought that was unbelieveable power.

Test and tune days are 120 plus spectator passes for people that come with and you only get 2-3 runs in. Sometimes it is a hard sell to get the people, and date set. Harder as you get older.

Last edited by spinn; 07-15-2012 at 06:02 PM.
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Old 07-15-2012, 06:23 PM
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RV cam? whats that?

With out some specs its hard to determine stall speed/gear ratio/shift points.The original cam that came in a used car I bought was totally done at 4500 rpm and it was 420 lift. 305 heads are not very good,vortecs seem to have good flow numbers for over 400 hp engines.The dual plane aluminum sounds good as recommended already. Q jets can work well too.whats your budget and intentions?Exhaust system you have is what?

test and tune is a great idea if there is a local track that can accommodate you.Good place to learn.
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Old 07-15-2012, 06:25 PM
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My 350's built 8.5-9 to 1 with cams around 450 lift, performer intake 600 cfm carb, 3.73 28" tire, 2400-3000 stall th350's were in the 14's. In 3800lbs full size gm cars. Pre 95 engine building, vortecs were not out yet.

Route 66 drag way used to have test and tune once a month. It was expensive. Byron was much cheaper but farther.
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Old 07-15-2012, 06:29 PM
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it has a dual exhaust 2" with headers, i live in wooler near shannonville which has a track but i think its only 1/8 not 1/4 mile. i do plan on going and seeing what it can do, also plan on having the tranny rebuilt with all the go fast parts, like forward drum, stator support, 2nd band replaced with the wider one etc... guess ill wait and see what it runs first then post back and go from there...
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Old 07-15-2012, 06:42 PM
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The IL electromotive plant for train rebuilding sometimes had 2 events in the summertime. A chassis dyno and a 1/8 mile coarse in the parking lot. The second was a road coarse in their parking lot. It was a lot of fun, had to sign a waiver/release. Have not seen them do that in a while. The road coarse had some dog legs and many cones were flattened that day. See the 70 monte carlos and heavy chevys competeing for times with a honda / toyotas. Really a good time.

Early 90s a 70s grand prix made 260 rwhp , ran 14.4 at 95mph.TH350 3.73 28" tire 3000 stall ,462 heads on a 355, 650 carb, headers. What did I do wrong? That was pretty good no? Big blocks were in the 13's.

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Old 07-15-2012, 06:45 PM
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sounds like fun. Just make as many passes as you can,get used to the car and enjoy the day.Then you have 1 or 2 weeks until next time trial and you can do 1 change and see what improvements you get.
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