re: Speedo Drive Gear - oh ...eeks that will be a lot of teeth on the speedo cable's gear to compensateIt should be an 8 tooth if it's from a 90 5.0.
Are you trying to keep it original? A 351W at your power level has gobs of potential waiting to be unlocked. The right parts would more than double that power. 300+ at the wheels is a pretty easy. Smoke the mini-van & the 350.
If you're going through the trouble of swapping gears, have you considered adding a trac-loc diff?
CRAP!!!!!! it's going to take a lot for my car to beat it LOL2024 Honda Odssey
280 hp @6k RPMs
4500(+-) lbs
14.5 sec quarter mile
not really, I forget the torque numbers, but on the street that's what matters, look for HP to weight ratio, write down where the torque band is on each, you have to look at tire heights, gear ratio, first/second trans gear if you wanna get really techy, it's easy going 80-100 MPH, it's getting there that matters.CRAP!!!!!! it's going to take a lot for my car to beat it LOL
That's stock 5spd 5.0 fox territory. Our cars are so slow, stock.2024 Honda Odssey
280 hp @6k RPMs
4500(+-) lbs
14.5 sec quarter mile
You should prolly know, assuming your speedo is calibrated like ours are, that the 23-tooth driven gear you'll need for 3.73s will tear up over and over and lead to speedo bouncing and eventually no speedo.re: Speedo Drive Gear - oh ...eeks that will be a lot of teeth on the speedo cable's gear to compensate
Yes trying to keep it original.
And yes I will be going with an Eaton TrueTrac helical-gear style, limited-slip differential. I'll be storing the original open diff along with the original 3spd Top Loader, and original bell housing.
Yeah I know the 351w has a potential for a good amount of HP, but requires visible enhancements like ; Headers, heads, etc.
Any power enhancements would have to be stealthy. Thought about going to EFI for driveability sakes (the original autolite 4300 is currently giving me problems (bogging on accel) ) . The system is under the air cleaner so out of sight.
I bought the car in 1992 from the original owner, a vietnam vet who bought it as a present to himself for surviving his tour.
Well damn he had some nice cars!!!! can't get much better than those two.my pop had a 70 Boss 302, and a 68.5 428 Super Cobra Jet
that's kind of the goal.....beating a the mini-van was just for added bonus. I KNOW my 350z whips my Mach 1's ass and gets DOUBLE MPG.but I do want to smoke the tires at will
Yeah the fact that I don't have to run friction modifiers with the true-trac and the reviews were so good it was the choice....I thought about going with a nodular gear case, but think it is overkill for such a low HP car (about a $500 difference). BTW I'm getting the whole center section so I can keep the original senter section as a unit.Awesome choice on the diff. Didn't know what kinda budget you were thinkin of
yeah....hence the eeeks .....the alternative is replace the speedo drive gear to either a 6 or 7.....but ugh I don't want to remove the transmission.....I might hire someone to do that if it is an 8tooth....what colors were the 6,7,8 tooth ones....do you know?You should prolly know, assuming your speedo is calibrated like ours are, that the 23-tooth driven gear you'll need for 3.73s will tear up over and over and lead to speedo bouncing and eventually no speedo.
yeah....hence the eeeks .....the alternative is replace the speedo drive gear to either a 6 or 7.....but ugh I don't want to remove the transmission.....I might hire someone to do that if it is an 8tooth....what colors were the 6,7,8 tooth ones....do you know?
EXACTLY where I am getting my complete center section...with the Eaton.....I have to do some measurements of the yoke to make sure I get the right one.I purchased most of my rear end items from Quick Performance... Good people to deal with and they helped me out the 2 times I called them for help...
No problem, bud. I like this stuff! Anyways, if you know it's an 18 tooth, then we can figure out the drive gear by the difference between the GPS & the speedometer... probably. Do me a favor and get 2 different speed reading differentials. The peg in the speedo can also be offset, which would throw off the calculations, too. If we have 2 speed readings against their GPS speeds, then we can still figure things out.I believe I changed my speedo gear to an 18tooth when I put the T5 in ....I have to get gas for the old girl...I 'll compare the iphone's GPS and see what the MPH is reading on the dash at 45mph on the phone. I'll report back.
SW RPM | GPS MPH | DASH MPH |
1200-ish | 29 | 30 |
1300-ish | 38 | 40 |
1500 | 40 | 42 |
1500 | 43 | 45 |
?? | 45 | 45 |
1700 | 48 | 50 |
2200 | 58 | 60 |
2000 | 58 | 60 |
GPS Speed | RPM in 4th gear |
29 | 1,211 |
38 | 1,586 |
40 | 1,670 |
43 | 1,795 |
45 | 1,878 |
48 | 2,004 |
58 | 2,421 |
When you run those 225/70/14 (right?), that's a pretty big difference. To have the same effective gear ratio, you'd already need 3.27s. That would keep it driving the same way it is now. So, keep that in mind.Did a lot of spirited driving today and am now "fearing the gear" :-( Right now I'm out of first gear around 20MPH at 3000rpm, but then again I'm out of 1st gear in the 350z at about the same speed. Also I am running smaller diameter tires than I should be so...maybe my fear would go away after I get the taller tires.
WC T5 '86.5-'89 (2.95 1st for T5Z) | % drop | WC T5 90-93(2.95 1st for T5Z) | % drop |
3.350724638 | 7(83-89) or 8(90+) | 3.350724638 | |
1.992438563 | 40.54% | 1.928166352 | 42.46% |
1.325337331 | 33.48% | 1.287517532 | 33.23% |
1 | 24.55% | 1 | 22.33% |
0.676492262 | 32.35% | 0.676492262 | 32.35% |