TXMazdaSpeeder
T is for Turbo
- :
- 2003 Black Mica MSP #566
i think he is geared diff than u areReplica said:
N/A Timeslips
- Thread starter blaktoutprobe
- Start date
flat_black
Member
Remember that your wheel and tire size makes a difference on final gearing; I know Andrew (Twilight) is wearing 205/45R16 Toyo's on his, so his final gear is lower than someone riding on, for example, the stock 195/50R16's.
twilightprotege
Member
- :
- 2001 323 Astina SP20 (P5)
i was just guessing actually - to make a point.
but it's not far off that. i've got an excel spreadsheet at home with all the gear ratios in it and i can calculate the speed in any gear at any rpm. will post what i change down to when i get home tonight
but it's not far off that. i've got an excel spreadsheet at home with all the gear ratios in it and i can calculate the speed in any gear at any rpm. will post what i change down to when i get home tonight
flat_black
Member
Remove the VTCS and port the intake manifold; Then your P5 will BEG for the 4k RPM milestone. 
twilightprotege
Member
- :
- 2001 323 Astina SP20 (P5)
torque isnt everything. thing of F1 cars. crap loads of power and hardly any torque. torque is turning power yes, but hp is work. more hp you can produce the more work your engine will be able to do.
think of my car. i have less torque than stock, yet my car is almost 1 second quicker than stock over a 1/4 mile
think of my car. i have less torque than stock, yet my car is almost 1 second quicker than stock over a 1/4 mile
i dont think tire size might be that big of an issue (in this case). Look at this site:
http://www.miata.net/garage/tirecalc.html
put in the different tire sizes and it will tell you what the difference is.
http://www.miata.net/garage/tirecalc.html
put in the different tire sizes and it will tell you what the difference is.
twilightprotege
Member
- :
- 2001 323 Astina SP20 (P5)
still with all else being even, having smaller tyres means power quicker. quicker power = faster car.
twilightprotege
Member
- :
- 2001 323 Astina SP20 (P5)
as promised : gearing spreadsheet.
this is my figures, all you need to do is change the yellow cells.
http://users.tpg.com.au/katsuro/gearing.xls
this is my figures, all you need to do is change the yellow cells.
http://users.tpg.com.au/katsuro/gearing.xls
Torque is everything. When my last car was boosted it was all about sitting in the trq in the powerband. There was no point reving it high. I might have made 120whp at 4psi, but the trq was so much higher than other Hondas. A great example was racing a 6th gen SI. A B16 usually makes about 135whp and about 100wtrq, I raced one on the highway and pulled it the whole way in my crappy DX that stock, might have made 95whp, making less hp and more trq. It you're relying in hp on a motor that stops making power at 6,000 (if you had a FS-DE), god save us all.Gen1GT said:
Replica said:
(smash) sigh........
It's not because your car is making torque though, it's because it's making more horsepower in the low end. If a stock Si has 100lb-ft at say, 5000RPM, it's actually making 95hp at that same RPM (HP=TQRPM5252). If your turbo car was making 125lb-ft at 5000RPM, it's also making 119hp at that same RPM. It isn't because you're making more torque at that RPM, it's because you're making more horsepower at that RPM that makes you go faster. Understand?
If you're making a lot of torque, you're automatically making horsepower. With your turbo car, you might have had 80hp at 2500RPM, wheras the Si might have only had 30hp at 2500RPM. THAT'S why your car was so much faster.
Although, if you had that 120hp and I was driving that Si, I'd smoke you, because I know how to drive. (rei)
Ya, and 'there's no replacement for displacement" right? That's oldschool man. Do you think Schumaker's Ferrari is winning races because he has torque? No, it's because his engine makes over 900hp at 19,000RPM. Do you think a top fuel dragster hits 300mph in 5 seconds because it has torque? No, because it has 10,000hp at 11,000RPM.glitch32 said:i always heard hp sells cars, but torque wins races... but what u guys are sayin makes sense to me... and i like more hp.... the more hp, the better
But, a Mac truck can PULL 100,000lbs because it has 1500lb-ft of torque.
p5sundevil
Member
- :
- 03.5 MidnightBlue p5
ahh the sound of an F1 ferrari driven by one of the best drivers ever(along with senna) singing to that 19k mark.....pants.need.changing.
no replacement for displacement can be true, depending on your budget.
if you dont have that much money, go buy a used mustang. big engine and good power for not that much. with a bigger budget you can take a 4 or a 6 without going over the 3.0l mark, add a turbo and make twice the hp of the other guy's mustang and laugh at him when he says there's no replacement for displacement and wave at him when you finish the 1/4 2seconds in front of him hehe
if you dont have that much money, go buy a used mustang. big engine and good power for not that much. with a bigger budget you can take a 4 or a 6 without going over the 3.0l mark, add a turbo and make twice the hp of the other guy's mustang and laugh at him when he says there's no replacement for displacement and wave at him when you finish the 1/4 2seconds in front of him hehe
flat_black
Member
Said he who wanted to put side-draft carbs on his car. *snickers* Sorry, just ribbin' ya. =) S'all in fun.
*snickers* Sorry, just ribbin' ya. =) S'all in fun.
