Randy N Connie
Registered User
DamonSlowpokeBaumann said:A 30 over piston will raise the compression slightly and in some instances (not sure about the SC) will help unshroud the valves. I would not consider a 30 over motor stock regardless of parts used for just that reason.
I think where this convo has gone of course is that there is a LOT MORE WORK involved when a motor comes out. For most, removing a motor or even heads is not an option as they cant afford teh downtime or just arnt mechanically inclined to that degree. Bolting on a blower, injectors, tb, mass air, ect ect ect is for the most part the first step and relatively easy. You need to of course set a goal in mind before starting any of this.
If I had a blown motor. I would build a great longblock and ad bolt ons later as I can afford. If my longblock is fine I would start with boltons untill I had an issue with my longblock. The reality is that people are NOT, for the most part, going to rip apart thier perfectly runnning motor. Semi hardcore people with the means will however do heads/cam ect. Very few will go down into the shortblock unless needbe.
In the end bolt ons will always be king and its up to us to find out the perfect combination of those for the average SC'r. Who wouldnt want to know just how much power in stock form can be made. Hell look at the 03-04 Cobra owners....
Back to Randys post. We should start to collect data to help those that dont have the means to touch thier shortblock or in most cases longblock. Maybe we can make a list of mods and hp for the good of everyone. It may not be perfect but its a start. I'd be more then willing to put this data together
I just did bolt-on's because my motor was and is in good shape.
I see no sence in throwing away a good running motor.Plus I
have had a learning curve to go though after buying this car.
And I have stayed with the stock motor,just to see if some of the
E.T.s and RWHP numbers are true that have been listed on the board.
I beleive a lot of them to not be true.
I would like to get back on a dyno,before I pull this motor..
And see what new numbers I may be able to come up with
my boost leak fixed. The 280 rwhp pull was done with 10%
OD blower pulley.I have a 15% OD but only did a dyno pulls
later with 20%OD after the 10% OD try. With the boost leak
fixed,We were able to take .450 seconds off are ET at the track.
This was after David D. retuned my car at 2:00 am in the morning
of the shootout day.I don't know how much .450sec in less E.T in
RWHP it takes to take this much time off with a 3800lb car..
I would like to add that the only one thing that is not stock inside
my OME motor is a 5 angle valve job.every thing else is
the same as the day it came from the Ford factory.
This answer is for another post I made on how much gain I got
from swapping a MPII to a MPIII. I gained 30 rwhp by bolting
on a MPIII. This was with no other part changes made.Same
tune,same over drive pulley.But with a boost leak. So I think
it safe to say that by bolting on a MPIII from a MPII anyone
should be able to pick up a minumin of 30 rwhp.
From my testing of MP products,When I bolted on a MPII I gained
27.9 rwhp.So with my test results,I would of picked up a total
of 57.9 rwhp going from a early M90 blower to a MPIII with
10% od.
Besides picking up 57.9 rwhp over a stock M90. I was able to
get first place in my class at the shootout.And I have not
seen anyone list over 280 rwhp dyno numbers with stock motor,
with M90 blower case.That they still own to prove by way of
tech tare down that they have made over this dyno number.
Thanks Randy
Last edited: