i'd run a bigger converter, and a steeper gear, but then i'm going to run out of gear at the end of the track when i run the nitrous. i guess i could always have a set of 28" tires to swap on, but now we're talking about changing the gear ratio, the converter, and having a backup set of wheels and tires. that's money adding up. i'm a cheap guy, I already have 26" tires so I'll hold on to those, and i have the 3600 stall, so I'll hold on to that too. I'll probably go with a 3.73 so that I'm not revving over 7,000 going through the traps. what i really want to know is, is my car going to go faster down the 1/4 with the trex, or something like the ms3/ms4?

 

oh yea, that's kinda what i figure. i don't fear the gear. i do want to make sure i'm not overrevving the car going through the traps though. I'm not really comfortable taking the stock bottom end above 7,000, I can't imagine it being safe. maybe i'm wrong. either way, with 4.10s, it would be ideal for cam only with the 26" tire, but not if i run a good shot of nitrous. there's really not much of a difference if i run a 26" tire with a 3.73 or a 28" tire with a 4.10, except that I would need to buy a 28" tire, so I pretty much just save money with the 373/26" combo unless there's something i'm not taking into consideration

 

How high do you plan on revving the car? Find a gear / tire / RPM calculator and start plugging in numbers. It isn't that hard. Just change one variable at a time and see what works out best for you.

 

i don't think i want to go over 7,000 rpm with the stock bottom end. i will have a 26" slick. i guess i'm more interested in how the car will run with a cam like the trex, with a 3600 stall and a 373 gear? and will the car be faster with the trex cam with that stall, or would it be faster with an ms3/ms4 cam?

I guess what it comes down to is I want to find out what cam will make the car run the fastest with 373s, 3600 stall, 26" tire, and a 200 shot of nitrous

 

^ If you are going to buy a cam get one specified for exactly that. That will work with all of the parameters you want, have better drivability, and only cost a few dollars more.

 

seems in your setup that would be a much better choice..
ms4 isnt necessarily "better" than an ms3... it all depends on your setup, a ms4 could run worse or better than an ms3 in any given setup.. i have the ms4 and love it... but in your situation, i would say an ms3 would better suit your setup..

no one is saying it wont pull like a mother.... my car pulls insane.. but if i had a 4400 stall it would pull that much better... just like if you had one it would pull better.. you could have went with a tad smaller cam and been just as fast... something like an ms3...

on nitrous i do..

im changing to a 28" though for that reason..

+1.. you wont be taking advantage of that cam.. so no reason to possibly have worse driveability than you might already be getting.. (depends on your tuner)... a good match for you like said would be the ms3..

i had 323s... and i went to 410s....... and am SOOOOOOO glad i did.. the seat of the pants dyno was AMAZING! i couldnt believe how much harder my car pulled and how much faster it got into the power band..
i installed my ported 90/90 and i picked up 35rwhp.... i felt that too..

i drive about 50-70 miles a day... mods were listed earlier.. ms4, 4k stall, PRC ls6s, 410s, etc... as long as you dont have to run over 60mph for extended period of time it isnt bad at all.. at 60mph im a hair over 2k rpms.. if you have to drive over 60 for quite a while on a DD driven car with 410s, i wouldnt recommend it.. to me it is well worth the performance gains..

you have to consider this.. you can put 410s in with a 28 inch tire.. and it will help bring your ratio down just at tad, better than 373s... OR you could run 373s with a 26 inch tire and have true 373s.. ALSO! say your cars race weight is 3500lbs and you have a 4k stall... the converter is going to flash to about 43-4500 depending on the converter... BUT! if you have a 3150lbs race weight with the same 4k stall you car is going to only be flashing 4100-4300..

the more weight you take out of the car, the lower the stall flashes too.. not a HUGE difference, but every bit counts.. just something else to factor into your decision..

like said i do... and wouldnt trade it for anything.. although like said, im going to a 28 tire.. i get out of the hole good enough now... im light and my converter flashes very high.. so i can take the little bit of loss in gear ratio..

 

I run a 28" tire with a th400 and 5000 stall and 4.10 gear with my MS4 car.

 

wish i would have went with a lot more stall..


when i go to my th400 i will be going with a 4400-4600... i will be spraying a nice shot, so i dont want to go too much over that..

what size shot you spray?

 

did u have to do much to get that tire to fit?

 

Looks like I'm going to go with 4.10's over the 3.73's. Maybe once I burned through my 26" mickeys i'll buy a set of 27 or 28" to run with the nitrous. so assuming 410s with the SS3600, i'm leaning towards an MS4. xhk651, I have two different people telling me they have spoken with Texas Speed, and they were told that the MS4 is basically an improvement over the MS3. *shrug*

 

Still trying to find out which off the shelf cam will make this car go the fastest with 4.10 gears and my SS3600 stall. Will the car actually go slower with something like a Trex compared to an MS4 with that combo?

 

on a camaro it takes a bit more.. on a trans am, there isnt as much work..
the wider fenders help the T/A fit wider tires more easily..

i think that is a good choice..
i dont know... maybe it is? but that isnt what ive picked up.. give TSP a call yourself and find out first hand... then relay that **** back here! haha..
your powerband is going to be different with a ms3 and ms4, along with street manners, rpm idle, shift points.... i just dont se how you could view it as somewhat the same cam.. they are completely different..

no it will not actually go slower.. there is just no reason to have that big of a cam if you are not going to take advantage of it...
FWIW, i make just as much power as people with trex cams.. the trex and the ms4 are almost identical cams.. the ms4 a SMUDGE smaller, but better manners, and easier to tune for most..
if it were me, i would of course go with the ms4... i LOVE mine.. and if your going 410s, the only difference in what were talking about is our stall.. you with a 3600, and me with a 4k... but mine does flash a higher than that...


let me know if you want to know anything else about my setup or anything...

 

a4 with 410's on the highway would be brutal. whats to stop him from keeping the 3.73's and use a larger stall?

 

I figure 410s would mean I have to go about 10mph slower to maintain the same rpms. If I had 373s right now I wouldn't touch it. Unfortunately, I have 342s, and I'm trying to get a little more by moving up a little bit. The 410s should help my low end more than the 410s if I go with a cam that doesn't have much low end.

 

Nope. Had to grind the brakes to make the rims fit, but as far as the tires (325/50/15) I just tossed them on. No hacking or cutting.

 

410s are not that bad for dd. At 60mph I'm at 2100-2200rpm, I can still do every bit of 160mph+......


Matt

 

why dont you try a smaller cam like a torquer v2-3 or 228? with the 150 shot and a huge cam i think the stock tranny will **** the bed.

 

its not that bad.. i like my 410s and 4k stall... really gets out of the hole hard..

+1.. same here..

although, depending on your tire size, i am going to call BS on 160+.. with a 26.5inch tire your top speed is going to be right around 135...
have you had your speedo recalibrated? if not, it is way off.. mine said i was doing over 160 on the way to the dyno, got it tuned and on the way back my speedo stopped right around 135..

 

maybe he's hitting overdrive? My friend says his 04 GTO shifts into OD while WOT, maybe you can program our cars to do that?

 

You can call bs all you want, I know what I have done.I have been side by side with numerous cars at that speed, of course I'm in OD. My speedo is recalibrated btw. I don't why your is stopping at 135? What rpm are you at?

Matt