[Spridgets] Update and advice on parts

[WeslakeMonza1330 at aol.com]

Weslake not Westlake!
 
I have a Ford gearbox and clutch.
 
If the car is going to be used on the road and in traffic I'd think about a 
 different clutch.  If the car is just going to be used in motorsport the  
solid plate clutch would be ok.
 
A 4.5 diff at 7,500 rpm should be 110mph on 13" x 70 profile tyres so your  
92mph sounds a bit low for 7,000rpm.
 
You want the car geared such that the estimated maximum speed occurs at the 
 peak power of the engine.  So you need to know if peak power is at  
7000rpm.  If your cam is the SPVP4 from APT then it might peak at  7000rpm though 
I'd guess a bit less.
 
120mph is a lot to expect of a Spridget and is a lot more to expect than  
118mph.  You'll need a car with some reasonable aero mods to achieve  120mph.
 
You'll not easily get 150bhp from a normally aspirated A-series and almost  
certainly not with cam you have.  And if you swap the cam to say the SPVP5  
it will need regular rebuilds to continue to achieve that power assuming 
you can  get it to produce that in the first place.
 
Weslake-Monza 1330
 
In a message dated 26/09/2009 04:24:42 GMT Daylight Time,  
mhagopian at hoppetool.com writes:

Paul- haha no problem! I was wondering who you were talking to?!

Westlake- I already bought the rivergate kit... it was supplied with  a 
"race" clutch solid disc with no springs, very small I would say probably 6"  
in dia.. I said 100hp because I was told that was the "break" point.. I want  
to build a motor closer to 150hp, could i have a few more details on your  
conversion please?
 
The motor I am using now is very strong and I am not sure the actual hp..  
I ran a 4.55 and a 4spd ribcase and the gears were very close(reving to 7k)  
and the top speed worked out to be around 92mph.. I am running at the glen 
and  am trying to make it to 120mph at 7000 rpm with the 5 speed. I was 
actually  planning on selling my locked 4.22 and open 4.55 and buy a locked 3.9 
or a  locked 4.55, I run at mostly long tracks. I ran New Jersey Motorsports 
Park  last Sept and spent the entire front straight at the rev limiter and 
the back  straight hit it for about 5 seconds. Unfortunately I dont know the 
exact power  my motor puts out... I asked for help because I bought from 
Bud Pazur and he  was unsure about the power and about rev limit.. Heres what 
I know..  scatterpattern cam type 4 i think its spvr4 or something? 12.5:1 
pistons .040"  over and a lot of extensive head work has been done.
 
David- The LSD is a Tran-X diff 4.22, I hope I end up in the front of the  
races I enter but chances are not considering I have only driven the car  
once.. but finished 7th! I know they sell a 5th gear lock out for competition  
use.. If I start winning and get bagged for it I could use this! Thanks for 
 the heads up!
 
 
Thanks for all of the advice guys I will check everything out.. Im still  
new to all of this!
 
Reply |Matt Hagopian to Paul 
show details 11:11 PM (0 minutes ago)  
Oooops-!
Meant to call you Matt, NOT David!

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