About to install a 125 shot (wet) and wondering what cam I should use with it.
Whats your reccomendations. I have had head work and intake port matched with 52 mm throttlebody (ported/polished,1.60/2.055valves,recontoured cc, 1.6rr's)#28 injectors, 255
intank pump. I will have computer programmed after cam install.
As far as ignition,
what will I need, will I need to retard timing.
Thanks for looking
Chad

 

224/228 .563 .563 114 lsa or 112 if u want it to lope

and yes u definetly need timing retard about 2 degrees for sure....

 

check out www.cmotorsports.com and look at their "nitrous" cams...

 

I like the sekection cmmotorsports had, just wasnt sure which would suite me best. The 230xl caught my eye
230/242 .510/.540 w/1.5 .544/.576 w/1.6 @114lsa
But I'm no engine builder and want someone with experience w/n20 to guide me in the right direction Thanks

 

Nitrous cams aren't as specialized as cams for SC or turbo cars. Basically, a good NA cam is a good nitrous cam. A bit wider LSA is a good idea, but much less important than for a SC setup. You don't post a lot about your combo and how you use the car. But in general, I would consider a 230/242 cam pretty big for a street driven LT1 (it's an LT1, right?). What gears are you running? Is it an A4 or M6?

Rich Krause

 

OK Its a stock internals LT1. Plus the head work and intake, 52mm throttlebody w/airfoil, GM # 28.5 injectors. 255 intank pump, adj. fpr, underdrive crank pulley, msd wires and coil, flowmaster catback no cats, ram air w/k&n, 1.6 rr's. Its a M6 w/star spec stage III carbon and stock gears for now. I have a set of 4.10's just scared to put them in with the nitrous. Thinking of getting some 3.73's , will the 3.73's work better with the n20. What all else do you recommend? It is not a daily driver. I hardly ever drive it except to play some on the weekends. I want to make the most power I can for now till I can afford a 383 buildup and maybe some forced air (which will prbably be a while).
Looking at nx 125 wet kit w/heater and purge and window switch and some kind of ignition system with retard and rev limiter

 

hey stik98...thats my cam , good thing ill be spraying...

 

4.10's would be fine with an M6, but you will never hook it up with street tires and 4.10's! The relatively weak low end from the cam can be compensated by bringing the nitrous in relatively low.

Rich Krause

 

Sorry forgot to mention, I have a set of BFG Drag Radials.
What cam would you reccomend? I'll pretty sure I'm going with the 3.73's unless 4.10's are better. Want to come out the hole strong but dont want to run out of steam.

 

that cam mentioned from cmotorsports is basically a CC306 ! maybe with different lobe profiles .. but the specs are pretty much the same ..

CC306 is 230 244 (same lift) and its what im running

i hear that generally u want a big split between intake and exh duration (exh larger than intake) as nitrous generates a LOT of exhaust while not having too much mass itself (so ur taking in small amounts of intake air/N2O mixture, but creating more exh because there is more oxygen per mass in N2O than air)

so a cam like CC306 or the cmotorsports cam would work to accomodate the extra exh created by nitrous usage ..

i wil be spraying my CC306 soon and will post dyno results... hope that helped

ps. the CC306 is not a bad daily driver .. but u really need gears .. i had 3.42s before and driving the car sucked pretty bad.. it was horrible on the street .. felt so gutless .. got the 3.73s and it felt a LOT better .. now moving to 4.10s and planning on revving to 7k at the track (pray for my stock internals ) .. if i started running out of steam i'll mount 28" tires ... but that cam pulls hard upto 7k .. so if u got ***** to rev ur motor, she will pull

pps. on another note for the LS1 guys giving cam advice to LT1 guys ... dont ur cams are a lot different as ur heads come with amazing exh flow compared to ours .. so most of ur cams are single pattern cams ... a 224 228 cam would not be so good in an LT1 motor unless the heads are ported with 80%+ efficiency... most LT1 cams have around 10 degrees of split between int and exh (i personally like more split for N2O usage) ... u LS1 guys are blessed with those heads .. me jealous

 

cc306 230/244 .510/.540 w/?.?rr's 112lsa
cm 230/242 .510/.540 w/1.5rr's .544/.576 w/1.6rr's 114lsa
What size rr's are used to get the advertised lift of the 306. If thats with 1.5 rr's I beleive i'll go with the cc306 and what is the lift at w/1.6rr's? Should be about the same as the cm cam and thanks for the info. And good luck with N20. I belive I'm going to keep the 4.10's and get some 3.73's and try them out on the new setup first. If I dont like em I'll throw the 4.10's in.

 

the cm and cc306 cams have the same lift

cc306 = 510 540 on 1.5 and 544 576 on 1.6

my cc306 is on 112 lsa .. im sure u can custom order it on any lsa u want ...

the only other thing the CM cam might be differnet in is the lope profile .. u might wanna check into that... more extreme ramping will get u better torque but is harsher on ur valvetrain ..

good luck...


ps. what do ur heads flow ?? u got the same size valves as me . i wonder what urs flow

 

Cant remember exactly so I dont want to lie to you. I should still have the papers somewhere.I'll see if I can find them.Thanks for all the input. Nice ride BTW. Like the black just hard to keep clean. At least mine is.
Chad