If you wouldn'd mind holding it at 4,000 in each gear , and taking note, it may be more accurate.
Thanks
![Smile :)](./images/smilies/icon_smile.gif)
HOLY CRAP - 91.28 mph at 3k rpms?!Yoda wrote: "Frankenstein" G25M-R 3.409:1 final drive
@3000 rpm
1st/3.666/16.93; 2nd/1.842/33.70; 3rd/1.31/47.38; 4th/1.03/65.55; 5th/0.795/91.28 MPH
@4000 rpm
1st/3.666/22.58; 2nd/1.842/44.93; 3rd/1.31/63.18; 4th/1.03/87.40; 5th/0.795/121.71 MPH
Actually, I have learned something from the iMazda guys. Only late model PGTs have the 4.39 final drive. That is why they were able to put the MSP LSD into a 95' PGT tranny and have it work, where Gro Harlem's didn't. He was fuzzy on the exact dates, but he thought it was only 97's that had 4.39's. The rest of PGT's are 4.11's according to one of the iMazda.com guru types.Mnemonic wrote:probe and mx-3 trannys are the same so...
Did you ever build this transmission? How did you acheive that final drive? Where did you source 1st and 2nd gear?Yoda wrote:Here's some numbers from a spreadsheet I created when I started working on my "Frankenstein" tranny project a few years ago just changed the rpm to the once you specified. All calculations were made with a tire diameter of 23.7"
MX-3 4.388:1 final drive
@3000 rpm
1st/3.307/14.58; 2nd/1.833/26.31; 3rd/1.31/36.81; 4th/1.03/46.82; 5th/0.795/60.66 MPH
@4000 rpm
1st/3.307/19.44; 2nd/1.833/34.91; 3rd/1.31/49.08; 4th/1.03/62.43; 5th/0.795/80.88 MPH
626/ MX6 4.11:1 final drive
@3000 rpm
1st/3.307/15.57; 2nd/1.833/28.09; 3rd/1.31/39.30; 4th/1.03/49.99; 5th/0.795/64.76 MPH
@4000 rpm
1st/3.307/20.76; 2nd/1.833/37.45; 3rd/1.31/52.40; 4th/1.03/66.65; 5th/0.795/86.35 MPH
"Frankenstein" G25M-R 3.409:1 final drive
@3000 rpm
1st/3.666/16.93; 2nd/1.842/33.70; 3rd/1.31/47.38; 4th/1.03/65.55; 5th/0.795/91.28 MPH
@4000 rpm
1st/3.666/22.58; 2nd/1.842/44.93; 3rd/1.31/63.18; 4th/1.03/87.40; 5th/0.795/121.71 MPH
wytbishop wrote:Actually, I have learned something from the iMazda guys. Only late model PGTs have the 4.39 final drive. That is why they were able to put the MSP LSD into a 95' PGT tranny and have it work, where Gro Harlem's didn't. He was fuzzy on the exact dates, but he thought it was only 97's that had 4.39's. The rest of PGT's are 4.11's according to one of the iMazda.com guru types.Mnemonic wrote:probe and mx-3 trannys are the same so...
I can't confirm it, but that is what they told me.
I was under the impression that the MX-6 and 93-95 Probes have the same FDR (4:10) and only the 96-97 Probes changed the final drive to 4:38 to make first gear more useful and lower the freeway cruising RPM.
I have personally verified that a 93 FDR is 4:10 and a 96 is 4:38 by removing the diff and doing the math with the # of teeth.
The only thing I'm not 100% clear on is if ALL years of the MX6 tranny are 4:10 FDR.
If my thoughts are correct, your transmission has no bearing on your times.
IIRC, gear ratios remained the same for all MX6s and Probes from 93-97.
At 7500 rpm the theoretical max speed 228.2 Mph. Actually it would not be like having a 6th gears. In a 6 speed tranny the 6th gears is usually geared pretty close to what most 5 speeds are gears at in 5th. (similar difference to between the 4.11 and 4.388 final drives at best) It is just that the gear ratios are spaces closed together usually to use the engine power better in a heavier car with a smaller engine or the keep the engine with a certain rpm range with a high revving DOHC that makes peak toque at higher rpms.Mooneggs wrote:HOLY CRAP - 91.28 mph at 3k rpms?!Yoda wrote: "Frankenstein" G25M-R 3.409:1 final drive
@3000 rpm
1st/3.666/16.93; 2nd/1.842/33.70; 3rd/1.31/47.38; 4th/1.03/65.55; 5th/0.795/91.28 MPH
@4000 rpm
1st/3.666/22.58; 2nd/1.842/44.93; 3rd/1.31/63.18; 4th/1.03/87.40; 5th/0.795/121.71 MPH![]()
based on these calculations that's almost like having a 6th gear LOL!
out of curiousity, any estimate at the top speed capability with that tranny at say 7500 rpm??