Upgrade it? Or stroke it?
Thread Starter
Staging Lane
Joined: Nov 2005
Posts: 52
Likes: 0
From: In CT
Upgrade it? Or stroke it? This is my current setup
350 bored .030 making it 355ci
TRW Forged Flat Tops 10.1 compression
Comp Cams Extreme Energy 262H .462/.469
GM Cast 64cc angle plug heads 2.02 valves
Comp Cams Magnum Roller Tip Rocker Arms 1.5 Ratio
GM Lt1 Intake comparable to (performer rpm)
GM 70 Corvette 700cfm Quadrajet (Jetted)
Im pretty pleased with this setup but should I spend the money and get a pair of Dart Iron Eagle Platnium 200cc 2.02/1.60 angle plug heads along with the next size up cam .477/.480 to make it perform better?? or should I just build a 383 with the combo below? Also what are better? strokers or your basic 350 because ive heard that strokers cant be revved as much, and they arent as responsive as a built 350? The car is primarlly a street car so it needs bottom end but also a good range. Im trying to stay on a budget but spending close to $4000 wont be a problem. So upgrade my 355 or stroke it?
Bore = 4.030
Stroke = 3.75
rod= 5.700
Eagle Competiton Rotating Assembly
Flat tops with 11.1 compression
Dart Iron Eagle Platnium 200cc 2.02/1.60 angle plugs
Comp Cams Xtreme Energy Flat Tappet 268/280 .477/.480
GM Lt1 Intake comparable to (performer rpm)
GM 70 Corvette 700cfm Quadrajet (Jetted)
Full roller rockers 1.6ratio
350 bored .030 making it 355ci
TRW Forged Flat Tops 10.1 compression
Comp Cams Extreme Energy 262H .462/.469
GM Cast 64cc angle plug heads 2.02 valves
Comp Cams Magnum Roller Tip Rocker Arms 1.5 Ratio
GM Lt1 Intake comparable to (performer rpm)
GM 70 Corvette 700cfm Quadrajet (Jetted)
Im pretty pleased with this setup but should I spend the money and get a pair of Dart Iron Eagle Platnium 200cc 2.02/1.60 angle plug heads along with the next size up cam .477/.480 to make it perform better?? or should I just build a 383 with the combo below? Also what are better? strokers or your basic 350 because ive heard that strokers cant be revved as much, and they arent as responsive as a built 350? The car is primarlly a street car so it needs bottom end but also a good range. Im trying to stay on a budget but spending close to $4000 wont be a problem. So upgrade my 355 or stroke it?
Bore = 4.030
Stroke = 3.75
rod= 5.700
Eagle Competiton Rotating Assembly
Flat tops with 11.1 compression
Dart Iron Eagle Platnium 200cc 2.02/1.60 angle plugs
Comp Cams Xtreme Energy Flat Tappet 268/280 .477/.480
GM Lt1 Intake comparable to (performer rpm)
GM 70 Corvette 700cfm Quadrajet (Jetted)
Full roller rockers 1.6ratio
May I suggest going with some AFR's. I had to spend a significant amount of money to get my Platinums where they should have been out of the box. The new Eliminator's from AFR look to be sweet heads.
Teching In
Joined: Apr 2006
Posts: 27
Likes: 0
Either way you go is going to give you a performance increase. And either one you do is going to leave you wondering if you shouldn't have gone the other way.
Will you be assembling the engine yourself? I would believe that you should be able to do both the stroker upgrade and heads at the same time for under $4000.
If it were my daily driven car, I would lean towards the 383. When your driving around and playing with the throttle a little from time to time as I do, that torque will always leave a smile on your face. But, with your heads, your right, it will run out of power pretty early. Like 4500 rpms with you setup. That does not mean that 383's in general wont rev. They just require more head to do so. I have turned them 7500 before.
The head swap will gain you a very noticable amount of power also, especially when you get a chance to run it up through the gears. If you do some weekend running at the track, either way you go is going to show up in the timeslips. It depends on gearing, weight, tires, stall (if auto) etc... as to which one would give you the best ET's.
Just my two cents.
Will you be assembling the engine yourself? I would believe that you should be able to do both the stroker upgrade and heads at the same time for under $4000.
If it were my daily driven car, I would lean towards the 383. When your driving around and playing with the throttle a little from time to time as I do, that torque will always leave a smile on your face. But, with your heads, your right, it will run out of power pretty early. Like 4500 rpms with you setup. That does not mean that 383's in general wont rev. They just require more head to do so. I have turned them 7500 before.
The head swap will gain you a very noticable amount of power also, especially when you get a chance to run it up through the gears. If you do some weekend running at the track, either way you go is going to show up in the timeslips. It depends on gearing, weight, tires, stall (if auto) etc... as to which one would give you the best ET's.
Just my two cents.
7 Second Club
iTrader: (5)
Joined: Nov 2001
Posts: 8,834
Likes: 1
From: Gainesville, Florida # of drag strips runs: ?!?!?
I'd do a 383 over a 350, and I ran nothing but 350's until my current motor. The not-revving high on 383 motors is BS.
I took the following combo:
355 with 10:1 TRW forged flat-tops, Crane small solid cam (518/536 lift, 230/238 duration), Canfield aluminum heads (195cc and 65 cc, 2.05/1.60 valves), Victor jr intake and 650 dp Holley, 1-3/4 headers and 3" exhaust.
This motor made 325 rwhp and ran an 11.96 best et in my Nova.
Current engine is a 383 with the same components as in the 355 except for new pistons for an 11:1 compression ratio.
This motor made 372 rwhp (can't remember torque, but a good 40 ft/lbs over the 355) and this combo ran an 11.46 best et in my Nova.
I've changed some stuff since then (not in the engine, but with exhaust, trans and carb choices).
Next motor I build is a 383 as well. This still gets driven on the street a few times a week and is still very civil (if I keep my foot out of the gas)
Derek
I took the following combo:
355 with 10:1 TRW forged flat-tops, Crane small solid cam (518/536 lift, 230/238 duration), Canfield aluminum heads (195cc and 65 cc, 2.05/1.60 valves), Victor jr intake and 650 dp Holley, 1-3/4 headers and 3" exhaust.
This motor made 325 rwhp and ran an 11.96 best et in my Nova.
Current engine is a 383 with the same components as in the 355 except for new pistons for an 11:1 compression ratio.
This motor made 372 rwhp (can't remember torque, but a good 40 ft/lbs over the 355) and this combo ran an 11.46 best et in my Nova.
I've changed some stuff since then (not in the engine, but with exhaust, trans and carb choices).
Next motor I build is a 383 as well. This still gets driven on the street a few times a week and is still very civil (if I keep my foot out of the gas)
Derek
Thread Starter
Staging Lane
Joined: Nov 2005
Posts: 52
Likes: 0
From: In CT
Theres alot to think about, but the AFRS's are very expensive through jegs unless you know of a better dealer? the 195cc competition ones are $1,915 a piece! The street aluminum ones arent bad im trying to get compression and 74cc heads are taking away from it. This was why i leaned toward the dart platniums because they are fairly priced and ive heard good things about them. Now these new AFR eliminators sound nice but they probably will be pricey also. The car has 4.10s and a tremec tko600 2.87 first gear and has 235/70/R15's on the back. Overall which way would any of you go for car a that can keep up with, and beat modded ls1 cars and all these new fuel injected rides, along with making the most power?? and any other head suggestions. Thanks for the help
flatlanderracing.com has the 195cc heads for $1380/pr. the 210cc heads are $1475/pr. If I had to do my engine over again I would have gone with the AFR's. Would have saved me about $1500 versus the money I had to put into the Platinums to get them where they should have been out of the box.
