Ok, so I've been looking into a bunch of options for the '93 ruby red convertible in the last 2 weeks, and I have finally settled in on a good one. I found a freshly built LT1 for sale locally, and I'm picking it up today! It is a 30 over engine with forged crank / rods / pistons, HV oil pump, 1.6 roller rockers, comp cams xtreme energy cam (220 / 230 duration @ 050, .510 / .510 lift with factory rocker arms, 114 deg. lobe separation). Engine has 10.75 - 11.00:1 compression. It has NO miles on it. The only thing is that it has lightly home ported heads with 2.00" valves. I want to dump the heads that are on it and get a set of AFR 180's. What do you guys think of this combo? Will these heads affect the compression of the engine? I would like a bigger cam, but it is already in there and assembled.

 

but if your pulling the heads anyways, swapping the cam would be no problem at all. just gotta pull the timing cover and timing gear. unless all the accessories are on. but even that would still totally be worth swapping in a bigger cam if your goin to buy those afr heads.

curious how much did you spend on the eng. and was it just built to sell? or was it for for someones car, then they changed there mind? what kind of crank, rods, pistons?
good luck with it.

chris

 

I have to look at the receipts, but I'm pretty sure it is a forged crank, forged trw pistons, and h-beam rods. Is the above cam small?? What kind of HP do you guys think this thing will push out? When I was talking to AFR on the phone, I gave them the engine specs and they told me that with the 180 heads, this current config. should be pushing 480HP at the flywheel.

 

Id say not 480 with that cam. maybe more like 415-430. whats your goals? its small if you like drag racing. good/average if you like road racing or autox or just cruising and good gas mileage too. just depends on what you want out of it for a power range.
oh, and when you have the heads off, test them for the CC size of the chamber to find out if theyve been milled to end at 10.75-11:1 ratio. if there milled, and the afr's are larger chamber, you'll lose some HP/tq by losing compression. might be enough to offset the HP gain of the much better heads. just a thought.
chris

 

he said flywheel, your talking RWHP probably.
anyways, what do u want from the car? You can get the AFRs milled down to help keep your compression up, or find a set of stock heads for a couple hundred and send them to lloyd or advanced inductions or lingenfelter, or something of the sort

 

With the Corvette's drivetrain he'll be luck to see 360 rwhp with that combination.

 

i do not see anywhere where he specified what vehicle its in, or transmission or anything. If you assume 20% loss (i know, kind of high) for an automatic, hed be looking at 385ish HP for 480flywheel, now, realistically a 4l60E is probably 12-15%, meaning he would have to make just over 400RWHP to reach his 480FWHP goal.

hes looking at a 355 with a 220/230 cam with 544/544, id say he could probably make 380-390 RWHP with a good tune and if everything is matched. I could be wrong though

 

Not in a C4 Corvette. Our cars dyno significantly lower than your F-Body's.

He is talking about a Corvette, posted the same thread on the Corvette Forum.

I also have a Corvette, and just recently started cruising this forum. It is very refreshing. Seems like all the Corvette guys wants to talk about is a Hot Cam upgrade. You guys definately like to push the limits of our LT1's.

 

Not a chance in France of 480 FWHP. Maybe 350-375 FWHP from they way you described. Some properly ported heads will help a bit and that cam is small by most racers standards. The 5 extra cubes and forged parts make very very little extra HP and you are not even full bolts on yet. The potential is there though.

 

Ok, I'll give the full list of parts going into the car. We picked up the engine today and it looks awesome. The cam was already posted above. The heads will be AFR 180's, competition port. I will do what I have to do to keep the compression at the same level it is in now. 1.6 roller rockers, 30lb/hr injectors, LT4 intake matched to heads, 52mm TB, 1 3/4" TPIS longtubes, meziere electric water pump, NO CATS, stock mufflers. The car is a 93 40th anniversary vette convertible with a 6 speed.

 

Dude you are crazy if you think these parts will make 350FWHP. Just......stop it.

 

yeah, but if you read through this thread, he never mentioned it was a corvette, i was just assuming a camaro

 

I'm still sticking with my 360 rwhp max prediction.

Will the LT4 intake even work with the AFR 180's? Thought they were LT1 heads.

 

I am probably going to end up getting another cam to better match the AFR heads. As far as HP predictions, my first idea was to go with a set of LE2 heads and a LE1.5 cam and after speaking with Lloyd himself, he told me to expect about 410RWHP give or take. Now I know Lloyd's heads are completely bad ***, but they can't be as good as a set of CNC ported AFR's. So how could I see 375FWHP with them? My goal for the car is atleast 400-425RWHP

 

What did you dyno with your setup?