nazar Posted August 19, 2006 Share Posted August 19, 2006 I am in the process of swapping out all my suspension and was thinking of stepping up the cam before i get around to finally doin the heads Right now i have an lt4 hotcam setup and ive made 332whp/341ft/lb torque I have seen many people with great results with this gm cam on stock heads, its about as big of a cam recommended for stock heads I have been hearing that I can make upwards of 360whp with this cam, so thats an extra 30whp with just another cam swap I can sell my lt4 cam and springs and make back some money. At the same time i will do a timing chain upgrade as well I was thinking my car at 2520lb with 360whp n/a would be nutzo I have no problems pulling away from viper gts's now with my lt4 cam, i was hoping to set my aims at ford gt's and a turbo ls1 ss in town. That may require nitrous though My friend just made over 400whp with his 847 cam, but he has extensive headwork and intake porting Quote Link to comment Share on other sites More sharing options...
roller Posted August 19, 2006 Share Posted August 19, 2006 that's a big cam. i like the gm 846 but if i did it over i would go back to the crane "baby cam" it's 210-224 and it works as good as the bigger cams. i know this from results. don't over look the little cam. Quote Link to comment Share on other sites More sharing options...
jbc3 Posted August 19, 2006 Share Posted August 19, 2006 IMO, the 847 will be too big for stock heads. If/when you put ported heads on, upgrade the cam. People too often over cam with stock heads and the car runs worse. It may sound lopey and good at idle and low end, but it won't perform. The Hot cam is a decent dcam for stock heads, I'd stay there until you upgrade. (BTW I am running the 847 cam with ported heads) Also, get the nitrous Jody Quote Link to comment Share on other sites More sharing options...
nazar Posted August 19, 2006 Author Share Posted August 19, 2006 Some say that it will run worse, but ive seen dynos over 350whp with stock heads and that cam, and never an lt4 hotcam that high I would actually not mind loosing a bit of lowend, its just so much of it as it is, I'd like to gain more of the 5500-6800rpm power curve I have the nitrous all ready to go, im really tempted, but the last thing i want to do now is break more ♥♥♥♥ I may just hold off and do heads and such and try to get 400whp N/A That at 2500lb and slicks should be good for high 10's Quote Link to comment Share on other sites More sharing options...
80LS1T Posted August 20, 2006 Share Posted August 20, 2006 jbc3, what heads are you running with that cam? 400+RWHP sounds pretty good for N/A! Guy Quote Link to comment Share on other sites More sharing options...
jbc3 Posted August 20, 2006 Share Posted August 20, 2006 I am running stock ported heads. Quote Link to comment Share on other sites More sharing options...
roller Posted August 21, 2006 Share Posted August 21, 2006 i run a f body and went from the 210-224 to the gm 846 and gained nothing. Quote Link to comment Share on other sites More sharing options...
80LS1T Posted August 21, 2006 Share Posted August 21, 2006 Do you have any flow numbers from your heads? I am looking to get about 400RWHP with my LT1 and Im running stock heads that have been ported. I am wondering if my heads will support that cam. Guy Quote Link to comment Share on other sites More sharing options...
jbc3 Posted August 21, 2006 Share Posted August 21, 2006 From my flow chart from 2/98 (Yes no typo.. 1998 ) Stock unported heads ...........100 ....200 ...300 ....400 ....500 ....600 Intake 59.53 120.24 171.48 199.62 212.35 201.69 Exhaust 44.35 91.54 118.15 137.79 148.88 153.94 After porting ...........100 ....200 ...300 ....400 ....500 ....600 Intake 65.38 131.20 180.66 223.01 252.93 249.37 Exhaust 56.12 104.50 133.46 157.06 182.77 195.12 These heads are the ones that are on my motor now. They have about 140K on them. I changed the springs and seals on these heads maybe 30k ago. Quote Link to comment Share on other sites More sharing options...
nazar Posted August 21, 2006 Author Share Posted August 21, 2006 From my flow chart from 2/98 (Yes no typo.. 1998 ) Stock unported heads ...........100 ....200 ...300 ....400 ....500 ....600 Intake 59.53 120.24 171.48 199.62 212.35 201.69 Exhaust 44.35 91.54 118.15 137.79 148.88 153.94 After porting ...........100 ....200 ...300 ....400 ....500 ....600 Intake 65.38 131.20 180.66 223.01 252.93 249.37 Exhaust 56.12 104.50 133.46 157.06 182.77 195.12 These heads are the ones that are on my motor now. They have about 140K on them. I changed the springs and seals on these heads maybe 30k ago. wow thats great power for those flow numbers, the guy who does heads here locally who is really popular with the street scene does lt1 heads to about 270 at 600 lift and 201 exhaust Im hoping with this cam, those heads and some intake work, i can squeeze off a healthy 400-420whp all motor on my lt1 Quote Link to comment Share on other sites More sharing options...
80LS1T Posted August 22, 2006 Share Posted August 22, 2006 My stock 93' heads before porting... INTAKE 100 200 300 400 500 600 700 ------------------------------------- 73 137 184 213 210 210 210 EXHAUST 50 93 128 162 171 174 178 My heads after porting... INTAKE 100 200 300 400 500 600 700 --------------------------------- 81 148 195 234 255 252 252 EXHAUST 58 108 149 181 197 208 212 What are you running for springs? My intake has been cleaned up and port matched too so I would guess that with a good tune I should be putting down close to the same numbers. I am going to get my car back on the road and then get it dyno'd with the LT$ HC and see what it does but I dont think it will get me into the 11's like I want to be. 11's for a street car is fast enough for me and that's where I plan to keep it for this car! Guy Quote Link to comment Share on other sites More sharing options...
jbc3 Posted August 22, 2006 Share Posted August 22, 2006 I think they are the Comp 955 springs (from memory, it's been awhile) and titanium retainers. I am also running the Pro Mag 1.6 RR's. Jody Quote Link to comment Share on other sites More sharing options...
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