1993 5.7L LT1 A4 Trans am
Has CAI, full exhaust with long tubes, Lt4 full hotcam kit and a mail tune from pcmforless.
What can I expect on a Dyno for numbers

 

290-310rwhp

 

If the tune is good it should make 340-350 RWHP on a Dynojet.

Should make 290-310 with full bolt-ons and a stock cam.

I had a 1999 Suburban 5.7 Vortec with a 95 LT1 F-car cam, 1.6 rockers, ported lower intake, 1 5/8" long tubes, dual 2.25" exhaust, Volant CAI, electric fans, and a tune put down 290 rwhp in 2nd gear. Hot cam would have added 30 rwhp to that setup and the truck intake has longer runners and the L31 is a full point less compression.

 

I'd love to see an auto with bolt ons dyno over 300rwhp, never seen it

 

Yup, mine factory stock with and A4 dynode at 235 RWHP

 

Yeah I hate predicting what auto cars do on the dyno. Go to the track, OP!

 

Even some of the highest I've seen were like 245rwhp, a LT1 will not pick up 60rwhp from headers and an intake

 

My Iron headed LT1 in my Cadillac hearse dyno'd at 295 with an header flange exhaust leak with just bolt ons.

 

Headers, Intake, and a tune they will.

I have seen the B-car come close to 300 RWHP numerous times as well. They had a full point less compression with the iron heads and a smaller cam than the aluminum head motors too.

I tuned a F-car that had a Moroso intake, long tubes, exhaust with a off-road Y, valve springs, and 1.7 rockers that made 315 RWHP/350RWTQ through a locked converter A4.

My buddies 97 A4 made 270 rwhp STOCK and ran a 13.2 @ 102.

 

Sounds like your buddy lied to you. A stock lt1 running about 5-7mph faster and about a full second quicker than stock. Also dynoing 30-35rwhp over pretty much every other car. Lt1s don't dyno within 5hp of the crank rating.

I guess I could see it if he had a lt4

 

For whatever it’s worth, OP also has the LT4 Hotcam “kit”.

 

I was there when it ran the 1/4 and was on the dyno. It was a used car when he bought it but it was maintained by that dealer and stone stock. I personally pulled the stock cam, heads, intake manifold, exhaust manifolds, and Y-pipe off it and swapped a set of LE2 heads on it with a CC305 cam, ported intake, 58mm throttle body, headers and off-road Y-pipe on it and tuned it. It made 380 to the tires and ran a 11.8 @ 118 after with a 2,800 stall and 3.42s

Crank rating was 305 hp in that 97 and it has been proven by multiple stock rebuilds a LT1 made more than its 300 hp Vette crank rating in ALL applications.

Another friend of mine with a low mileage 1992 LB9 305 TPI/5spd 3.45 gear G92 car that was also bone stock went 13.9 @ 99 that night at the track.

We were also running with a girl that was racing a 1997 Firebird A4 with a catback and Moroso intake that ran a 13.4 @ 101.

LT1s are stronger than most people care to believe.

Super Chevy built a stone stock LT1 and it made about 350 HP and 380 TQ on an engine dyno dyno with long tubes.

A B-car with an 8.5" rear end loses 18% through the driveline. A F-car 1-2% less with its smaller and lighter 7.5" rear and lighter driveshaft.

 

Well I know that all dynos are different but my 94 Formula A4 with AS&M headers, exhaust, CAI, LT4 Hotcam Kit, underdrive pulley and a tune made 327RWHP.
My 94Z28 A4 with MAC headers, exhaust, CAI, 1.7 Roller Rockers, underdrive pulley and a tune made 297RWHP.

 

Uh.....no.

With all the bolt-ons, stock heads and going through a 4L60 trans......he's looking at 310HP to the wheels.....tops.

KW

 

I guessing around 305-320rw similar to the above post. All depends on what dyno you are on and how good the tune is. Its not all about peak numbers but more about the most average hp/tq in your usable rpm range.
Im hoping to be around 320rw+ with my 215/224 cam, 1.6 RR'S, EWP, 1 5/8 Mac Mids, no cats, magnaflow catback. This car is a m6 trans though.
Also ppl don't give a lot of thought to tire size, a big 315 rear tire will rob more rwhp than a stock 245 tire.

 

UMM...NO! Hotcam kit properly tuned with headers and good exhaust makes about 425 hp at the crank. F-car A4 with 7.5" rear drivetrain loses about 16%. 425 x 0.84 = 357. If it does not make 340 rwhp something is wrong. I put a Hotcam kit in a D-car (Fleetwood)years ago that made 340 rwhp UNTUNED and it still had factory manifolds and factory cats on it. Only mods other than the cam and rockers was a K&N cold air intake, 52mm TB, and 2.5" catback exhaust. With 3.73 gears and a S10 converter that car ran high 12s at 106 mph. B/D-car loses about 18%.

 

Yeah I read that magazine article as well. I never ran into any of these hot cam only cars that were supposedly making this "425hp" that could come close to my times or mph at the track when I was making 430hp/370rwhp with LPE heads/cam with a six speed.

 

I had a Hotcam in a 8.9:1 350 TBI with Vortec heads and a single plane 2bbl victor jr intake that made 357 RWHP through a 700r4, GM 2 piece driveshaft with carrier bearing and 9.5" 14-bolt rear. Pushed a 5,300 lbs G-van to a 14.1 @ 101 with a 2.2s 60'. 3.07 gears and a stock 1,600 rpm stall converter in the 4L60E. Smoked the 700r4 and I had swapped a built 4L60E in its place.

 

Pretty sure that old article was a lt4 cam kit with lt4 heads not lt1 heads. Lt1 heads flow around 215cfm stock, lt4 heads flow around 240cfm stock. With a lt4 head its believable.
But no way in hell is a 218/228 hot cam with a 215cfm stock lt1 head on a stock shortblock gonna make 425fwhp.

 

No.....the LT4/Hot cam conversion makes that at the crank. And that's WITH the LT4 Heads/Intake.


Yeah......right.

I'll stand by what I've done, seen, experienced over the past 22 years of dealing with the Hot cam kit versus what you claim.

SMDH

KW