Just thot that I'd let anybody that's interested know that the LT4 cam is in and the car runs great without any changes to tuning except for 2 degrees added timing and I don't know if that was necessary or not. I just wanted to try a little more timing. I have not changed the fuel curve any. The scanner reads BLM of 125 at 70 to 80 cruise in 5th gear and it does not get any knock counts at normal accell or WOT. There's probably more performance to be gained as I have not done any plug cut's or messed with the timing curve or fuel in the chip at all. The car pulls much better now! Makes me want to install an intake this weekend but I'm not sure what heads I will end up using. Hope this helps anyone that wants to use this cam for some reason.

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91 RS 5.0 TBI....LT4 cam....Edelbrock headers....3"Dynomax exhaust....5spd.... 3.08.....Ultimate tbi....afpr...

 

sounds good. are you still getting good throttle response? what are the numbers onthe LT4 cam? isn't that like .492 lift?

later
tim

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91 Camaro RS-LO3,Auto
New Times Coming Soon!
Check Out The East Coast F-Body Nationals Home Page
www.geocities.com/njspeeder
My MAFB.ORG Home Page
www.mycar.net/mafb/registry/detail.cfm?id=299
DSI Racing Home Page
www.geocities.com/foff667

 

Tim, it has great throttle response. I am really surprised that it did not need more initial tuning. The numbers are 203 int and 210 exh dur@.050. The lift with 1.5 rockers are 446 int and 449 exh. With 1.6 rockers 476 int and 479 exh. 115 l.c. It's not that much different from the LT1's. It has a little more dur and a lower l.c. The lift that you will have with you LT1 will be higher. I am only running the stock 1.5 rockers for now. If I quit trying to talk myself into doing something different I will be installing my Vortec heads, Performer vortec intake, and 1.6 Crane full rollers. People say it should run good and they're probably correct. Just the cam with the stock intake and heads has me spinning the tires coming out of some corners again! Before the cam swap it would not do this so I'm assuming more power is on tap.

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91 RS 5.0 TBI....LT4 cam....Edelbrock headers....3"Dynomax exhaust....5spd.... 3.08.....Ultimate tbi....afpr...

 

Ya know Tim, I missed the .492 lift question. You aren't thinking that I have the LT4 hot cam are you? That is the 1.5 lift for that cam.

 

i think i am thinking of the hot cam. sounds kewl though.
you'll hafta make it up here to NJ sometime.....hmmmmm maybe for the 2nd Annual East Coast Nats

later
tim

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91 Camaro RS-LO3,Auto
New Times Coming Soon!
Check Out The East Coast F-Body Nationals Home Page
www.geocities.com/njspeeder
My MAFB.ORG Home Page
www.mycar.net/mafb/registry/detail.cfm?id=299
DSI Racing Home Page
www.geocities.com/foff667

 

Taking a road trip sounds kool. It's funny but, the car seems to be getting better gas milage. I'll know when I fill up this weekend. I just don't see how as I've been enjoying the added power quite often.

 

Hey you have a good combo in the making. I have the Same setup you speak of as you can see in my sig. I will say it will scream however I have no Track times.


Brian

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1989 Camaro RS

305 .030 over Hydro Pistons
Vortech heads milled to 58cc...Performer RPM intake....LT4 cam..Crane Gold rockers...FastChip custom chip...ALum. Driveshaft...3.73 gears with Posi...underdrive pullys...Rebuilt 700R4 with Vette Servo and B&M shift Kit...MSD ignition...A/C Delete No SMOG junk....1997 SS leather interior...B&M Shifter... Ultimate TBI mods...14X3 K&N open Element Non-Drop...Hooker headers....3" exhaust with Flowmaster Cross flow 16X8 Wheels from 97 RS Spohn LCA's Spohn Panhard Bar..LETS PLAY FORD!!

www.geocities.com/feltsb

 

Brian Felts??? you think a mid 14 second car is a SCREAMER?????

 

Thanks Brian, I hope that it does run well. Import, as far as screaming compared to the stock LO3 I'm sure it does. 14.5? who knows and if the owner is happy with it that is all that matters but elapsed times are not always going to show all the power that the engine is making due to setup, conditions and driver experience. For me powering through some twisties and coming off some corners with some torque is what I'm looking for.

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91 RS 5.0 TBI....LT4 cam....Edelbrock headers....3"Dynomax exhaust....5spd.... 3.08.....Ultimate tbi....afpr...

 

DM, did you use the stock springs with that cam?

Jason

 

Jason Yes I used the stock springs. I changed the oil pump, oil pan, timing set, front cover and balancer because I had newer parts on hand and spent alot of time cleaning. It runs better.