Got a question. Need opinions.
Thread Starter
Senior Member
Joined: Jan 2001
Posts: 769
Likes: 4
From: DC_MD_VA Area
Car: 1991 Camaro RS
Engine: L03 305 V-8 (for now ;) )
Transmission: T-5 5 speed
Axle/Gears: stock... whatever that means :)
Got a question. Need opinions.
Hey guys/gals...
As my sig says, I have a 91 Camaro RS L03. I've had this car for about 4 years now and I have finally started building up an engine for it. Here is my ORIGINAL plan...
383 (2-bolt late 80's/early 90's roller block converted to 4-bolt) AFR 195cc heads, 10.5:1, miniram, steel crank/rods, forged pistons, Comp XFI280 cam, Commander 950.
Well, due to cash limitations (just got married), the machine shop has only done the basic machine work on the block (4-bolt conversion, lined-bored and honed the mains) so I am still open to making changes. I have since decided to change the direction of the project.
Im thinking about building the 383 with 9:1 compression. Why? So I can install a D1SC Procharger on it later. I was thinking that I can build it this way, put some miles on it, and then put the Procharger on it. I talked to Comp Cams and ATI and they both feel that this can work, same cam and all. ATI thinks that the cam is a GREAT blower cam. So does my engine builder. So does CompCams.
What do you guys think? Im open to serious opinions. Hell, I havent even ordered the crank yet (I do have rods though) so I can make changes at any time.
Im finally recovering financially from the wedding and Christmas so the money will be looking good REAL SOON! And the wife is in FULL SUPPORT of the Camaro project.
Again, serious opinions ONLY. Thanks in advance!
Oh, I have built this combo NORMALLY ASPIRATED in Desktop Dyno. If anyone wants to see the dyno file, let me know and I will email it to you.
Again, THANK YOU IN ADVANCE!
As my sig says, I have a 91 Camaro RS L03. I've had this car for about 4 years now and I have finally started building up an engine for it. Here is my ORIGINAL plan...
383 (2-bolt late 80's/early 90's roller block converted to 4-bolt) AFR 195cc heads, 10.5:1, miniram, steel crank/rods, forged pistons, Comp XFI280 cam, Commander 950.
Well, due to cash limitations (just got married), the machine shop has only done the basic machine work on the block (4-bolt conversion, lined-bored and honed the mains) so I am still open to making changes. I have since decided to change the direction of the project.
Im thinking about building the 383 with 9:1 compression. Why? So I can install a D1SC Procharger on it later. I was thinking that I can build it this way, put some miles on it, and then put the Procharger on it. I talked to Comp Cams and ATI and they both feel that this can work, same cam and all. ATI thinks that the cam is a GREAT blower cam. So does my engine builder. So does CompCams.
What do you guys think? Im open to serious opinions. Hell, I havent even ordered the crank yet (I do have rods though) so I can make changes at any time.
Im finally recovering financially from the wedding and Christmas so the money will be looking good REAL SOON! And the wife is in FULL SUPPORT of the Camaro project.
Again, serious opinions ONLY. Thanks in advance!
Oh, I have built this combo NORMALLY ASPIRATED in Desktop Dyno. If anyone wants to see the dyno file, let me know and I will email it to you.
Again, THANK YOU IN ADVANCE!
Last edited by JAYDUBB; Jan 26, 2007 at 12:52 PM.
Member
Joined: Oct 2005
Posts: 177
Likes: 0
From: Austin, Tx
Car: 2005 Pontiac GTO
Engine: 364ci LS2
Transmission: 6 speed
Axle/Gears: 3.46
get a good crank, and the compression at 9:1 with some 76cc heads would do a procharger good.
and i would have a custom grind camshaft made specifically for your application... you will be happier in the long run
and i would have a custom grind camshaft made specifically for your application... you will be happier in the long run
Thread Starter
Senior Member
Joined: Jan 2001
Posts: 769
Likes: 4
From: DC_MD_VA Area
Car: 1991 Camaro RS
Engine: L03 305 V-8 (for now ;) )
Transmission: T-5 5 speed
Axle/Gears: stock... whatever that means :)
The cam specs...
Advertised duration= 280/288
Duration @ .050= 230/236
Lift w/ 1.6 rockers= .567/.570
Lobe separation angle= 113 degrees
Not good enough for a blower?
Advertised duration= 280/288
Duration @ .050= 230/236
Lift w/ 1.6 rockers= .567/.570
Lobe separation angle= 113 degrees
Not good enough for a blower?
Thread Starter
Senior Member
Joined: Jan 2001
Posts: 769
Likes: 4
From: DC_MD_VA Area
Car: 1991 Camaro RS
Engine: L03 305 V-8 (for now ;) )
Transmission: T-5 5 speed
Axle/Gears: stock... whatever that means :)
Can anyone advise? I know that there are some helpful folks out there.
Joined: Jun 2001
Posts: 8,028
Likes: 93
From: DC Metro Area
Car: 87TA 87Form 71Mach1 93FleetWB 04Cum
Is the car a driver or a toy? That cam will be just big enough that you’ll have issues dialing it in perfectly with compression that low, and I don’t think that you’ll be happy with it as a driver without more compression. OTOH, as a street strip toy, it’s not half bad.
Those XFI lobes make me wonder about long term durablility, but that's a totally seperate issue
Those XFI lobes make me wonder about long term durablility, but that's a totally seperate issue
Thread Starter
Senior Member
Joined: Jan 2001
Posts: 769
Likes: 4
From: DC_MD_VA Area
Car: 1991 Camaro RS
Engine: L03 305 V-8 (for now ;) )
Transmission: T-5 5 speed
Axle/Gears: stock... whatever that means :)
Is the car a driver or a toy? That cam will be just big enough that you’ll have issues dialing it in perfectly with compression that low, and I don’t think that you’ll be happy with it as a driver without more compression. OTOH, as a street strip toy, it’s not half bad.
Those XFI lobes make me wonder about long term durablility, but that's a totally seperate issue
Those XFI lobes make me wonder about long term durablility, but that's a totally seperate issue
Im gonna put a Procharger on this thing. I was gonna wait until later to put it on but I think Imma do it all at once.
Wish me luck! And thanks for the response!
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