Cars w/ GM847 and P&P Heads
#1
Cars w/ GM847 and P&P Heads
What is done to your car and what did you dyno?
I have been seeing a lot of different numbers being thrown around lately and a lot of different projections for my car. Just want to get a grasp of what I should be looking at to make power wise.
Here is a list of what is don/being done to my car:
Stage II P&P CNC'd LT1 Heads
GM847
Comp Magnum 1.52 rockers
Pace Setter LT's
3.73's
BUILT 4L60E
That's basically all that matters... and a little go go juice, but that doesn't matter for this.
I have been seeing a lot of different numbers being thrown around lately and a lot of different projections for my car. Just want to get a grasp of what I should be looking at to make power wise.
Here is a list of what is don/being done to my car:
Stage II P&P CNC'd LT1 Heads
GM847
Comp Magnum 1.52 rockers
Pace Setter LT's
3.73's
BUILT 4L60E
That's basically all that matters... and a little go go juice, but that doesn't matter for this.
#4
Re: Cars w/ GM847 and P&P Heads
I installed mine when I had my 383 built. I have no numbers yet. I just got it running a month ago and have not dynoed yet. I can tell you though that I like the set up and I think it performs real well. Almost everyone seems to be going with the Loyd combos lately and if I hadn't gotten such a good deal on this cam from Bunker, I would have cosidered a Loyd combo myself. My heads are ported out pretty good to feed the cam. You are talking stock cubes right? And you really should run 1.6 rockers to get the full effect of the cam, IMO.
#5
Re: Cars w/ GM847 and P&P Heads
(GTP-6) No idea on #'s as of yet. Heads flow almost exactly like most Lloyd heads I've seen posted up.
I'd be happy with numbers near what other folks with similar setups are putting down. Just need to get her tuned.
I'd be happy with numbers near what other folks with similar setups are putting down. Just need to get her tuned.
#6
Re: Cars w/ GM847 and P&P Heads
Originally Posted by blazzinbird
Why didnt you get 1.6rr's
also id say around 400 at the wheels with a good tune
also id say around 400 at the wheels with a good tune
'cause it was going to be a weekend thing and that is all that anyone here had in stock.
#10
Re: Cars w/ GM847 and P&P Heads
Well it should make close to 400rwhp but my old CC306 is doing alot better than those 847's I have seen. I haven't dynoed but have been 11.24@120.8mph with a 3,500lb car and 3.42's in the rear. Goodluck later Clint
#11
Re: Cars w/ GM847 and P&P Heads
Originally Posted by T/A lt1
Well it should make close to 400rwhp but my old CC306 is doing alot better than those 847's I have seen. I haven't dynoed but have been 11.24@120.8mph with a 3,500lb car and 3.42's in the rear. Goodluck later Clint
#12
Re: Cars w/ GM847 and P&P Heads
What about it? He ran 4.30 gears and probably lighter and only ran 11.98 one time. I have been 11.20's@120mph quite a few passes and try a set of LT1 heads on his car and see if it runs 11.20's. Possible but not easy. Later
#13
Re: Cars w/ GM847 and P&P Heads
Why the hating? His car is full weight (3600lbs) and yeah, he has 4.30s, but its a stick car. Not a TH350 with a stall. Plus, his car was a stock bottom end too, not a freshened up motor. Could it run 11.20s with a set of heads? I'd say so, and I'd think the mph would be up there too, maybe even a bit higher. Your combo kicks ***, but it appears that you aren't quite confident in it if you have to put someone else's setup down.
#15
Re: Cars w/ GM847 and P&P Heads
mine put down 363/349 with some tuning problems.
You must consider the numbers will be lower than expented with an auto and a stall.
I think if I got a good dyno tune it would be closer to the 400 mark.
I have mildly ported LT1 heads. 2.0/1.6 valve job. 1.6 r.r., built A4, 3000 stall, pacesetters, ory.
You must consider the numbers will be lower than expented with an auto and a stall.
I think if I got a good dyno tune it would be closer to the 400 mark.
I have mildly ported LT1 heads. 2.0/1.6 valve job. 1.6 r.r., built A4, 3000 stall, pacesetters, ory.