PDA

View Full Version : blower overdrive



ganuolfthegrey
03-25-2015, 10:04 PM
I have a 95 true s-port blower with mp plenum.
also have big valve heads and ported
50 pound injectors
double ic and meth
my question is this
my goal is to get to a repeatable 12.5 runs
after the engine is back in I have a few tweaks to be made on the tune. THANKS TO XR7 DAVE AND MOST OFF ALL. DR.FISH FOR HELPING ME FIX THE NOT DATA LOG ISSUE AT THE SHOOTOUT.

10%
15%
20%
what boost level does each one make roughly?
if you have no belt slip
what is safe for the blower it's self
while the motor is out being fixed
was thinking about going a little bigger
SO FAR WITH BAD HG'S AND RINGS NOT SEATED BLOWING THE DIPSTICK OUT ON THE DYNO. IT'S MADE 257HP AND 292. THROUGH A 2,800 NON LOCKUP
current weight of mine is 3,740 with out me. this was on a cat scale.

ganuolfthegrey
03-25-2015, 10:07 PM
6309663095

Jacob_Royer
03-25-2015, 11:17 PM
Id say no more than 15% man they just make heat and are counterproductive ! Does it have an mp plenum?

decipha
03-26-2015, 08:00 AM
15% is where the blowers limit is at which is 18,000 rpm

15% o/d on my 91 titanium which is closest to your setup, stock bottom end 3.8 with 95 s-port and ported big valve heads makes right at 276rwhp and about 13lbs of boost, it makes 11lbs with a stock pulley, all through a 4r70w w/ 3k-ish stall non lockup, no MP plenum on mine either, I'd like one just to see the gains but im not willing to pay the price, unless someone has one for sale at a reasonable price

ganuolfthegrey
03-26-2015, 08:20 AM
yes I have a mp plenum. I got mine long time ago for 300 bucks used. it made a big difference. mine has a built bottom end. the reason I am redoing is because the local shop here did very bad work on building it.
was curious if 20% would be to much. have no idea what it makes know. the dyno here has no way to log it. with 10% around town I hit 14 maybe 15.

ganuolfthegrey
03-26-2015, 08:33 AM
63099this was with 15% up to 5,500 rpm

David Neibert
03-26-2015, 08:56 AM
Ask your tuner.

David

Tim Groth
03-26-2015, 09:01 AM
The mods listed in your signature are very similar to the mods I had at last years shootout - I had terrible belt slip on the dyno time, for the shorter SC belt I had broke on the way to the shootout...on the dyno I put down 276hp 330tq (if mem serves me) with a clocked tensioner and the OE length belt... If I am reading your dyno charts correctly - I certainly think you should be able to make more power than 250hp.

I was running 15% OD on a home job S Port and MP Plenum when I made those numbers....

Good luck sorting it out - sounds like you should have more power than whats being made.


-Tim

decipha
03-26-2015, 03:59 PM
hey Tim, you making the EXACT same power my 91 is !!!

except i have a stock plenum and an untouched 94-95 blower :confused:

is the mp plenum really work the upgrade?

Tim Groth
03-26-2015, 04:12 PM
hey Tim, you making the EXACT same power my 91 is !!!

except i have a stock plenum and an untouched 94-95 blower :confused:

is the mp plenum really work the upgrade?

The numbers my car put down were limited due to the extreme belt slip and also tuning issues, so in all honesty the car should have made more power than showed up on the dyno. This was also the main point of my post and not to take away from the OP's questions.

If I were to post my dyno chart it looks like a rough sea instead of a smooth curve because of the converter locking and unlocking and then the belt slipping during the pulls... I beleive the MP Plenum is worth every penny and has been tested to show improved HP #'s

-Tim

ganuolfthegrey
03-26-2015, 06:12 PM
thanks for the input guys. I hoping once I get the motor fixed ie the rings and gaskets. the last bit of final tweaking. I would think 300hp would be attainable.
we had the stop with the tuning when issues dave brought to my attention. the fact the rings never seated and the headgaskets where leaking due to bad head torque.

XR7 Dave
03-26-2015, 07:48 PM
On a motor like his the MP plenum is typically worth 15rwhp. But you have to need the plenum before it does anything for you. On a stock motor an S-port with 10% OD will make plenty of boost. On a motor like this most likely 15% is better but the S-port doesn't like being spun faster than that unless you really start to limit rpm which is backwards thinking.

By looking at the dyno chart you can see the car had major issues so the power numbers mean absolutely nothing at this point. The S-port has been proven to support 300rwhp on an auto but that's about it so I'd not expect any more. Should be good for a high 12, but not consistent 12.50's.

ganuolfthegrey
03-26-2015, 07:59 PM
thanks dave for the info. I would be happy even with high 12's. just out of curiosity what would it take for a 12.5 run?
I would think a better cam? I don't know the size of the valves. but I will ask them when they check everything. i was told the guy based the porting off of the 03 cobra ports. with the cam i have i don't know if more porting would help. http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=837&sb=2 here is my cam. I am trying to learn as much as I can. I really don't see any future blower changes because of my money.
from threads I have researched. the mpx dosent seem to be worth the money over a s-port.

XR7 Dave
03-26-2015, 08:07 PM
Ha, funny I just installed that exact same cam in a car here. Results were terrible. I am yanking it out and putting in my own grind next week. I'll have before and after dyno for you.

ganuolfthegrey
03-26-2015, 08:08 PM
631006310163102
just some pics and I hope by sharing what I have learned. people can avoid some of my problems.

ganuolfthegrey
03-26-2015, 08:13 PM
how much would a cam cost? what would you recommend? my while fix week points while it's apart.

Jacob_Royer
03-27-2015, 02:30 AM
It does not matter how much od you run my car will always be faster :)

ganuolfthegrey
03-27-2015, 07:17 AM
You can't drive and don't say never. I will throw a bottle at it just to beat you.
plus my best lights have been. .501 and .002 on 2 different trees. I have the slips to prove it. I had witness on the .501
come at me bro

ganuolfthegrey
03-27-2015, 08:39 AM
plus there is a free kit in blue springs mo. that is brand new and on a 95 that I can help my self.
the owner will never no it's gone. his car dose not going any where.
it's always on the trailer.

Jacob_Royer
03-27-2015, 09:05 AM
You can't drive and don't say never. I will throw a bottle at it just to beat you.
plus mi best lights have been. .501 and .002 on 2 different trees. I have the slips to prove it. I had witness on the .501
come at me bro

Ive cut several .001s and I have made 2 identical ET passes back to back! You will never put the power to the pavement on street tires anyway lol

PDQ SC
03-27-2015, 09:14 AM
I have a 95 true s-port blower with mp plenum.
also have big valve heads and ported
50 pound injectors
double ic and meth
my question is this
my goal is to get to a repeatable 12.5 runs
after the engine is back in I have a few tweaks to be made on the tune. THANKS TO XR7 DAVE AND MOST OFF ALL. DR.FISH FOR HELPING ME FIX THE NOT DATA LOG ISSUE AT THE SHOOTOUT.

10%
15%
20%
what boost level does each one make roughly?
if you have no belt slip
what is safe for the blower it's self
while the motor is out being fixed
was thinking about going a little bigger
SO FAR WITH BAD HG'S AND RINGS NOT SEATED BLOWING THE DIPSTICK OUT ON THE DYNO. IT'S MADE 257HP AND 292. THROUGH A 2,800 NON LOCKUP
current weight of mine is 3,740 with out me. this was on a cat scale.

Jason, I think my top end is pretty similar to yours. With 15% it makes 300hp with 389tq. (auto trans) Very streetable and very reliable.

1FSTBRD
03-27-2015, 09:29 AM
Ganuolf, Jacob.....my dad can beat up your dad. :D

820
03-27-2015, 12:06 PM
ganuolf, jacob.....my dad can beat up your dad. :d

lol!!!!!!!!!!!

Jacob_Royer
03-27-2015, 03:31 PM
Ganuolf, Jacob.....my dad can beat up your dad. :D


This maybe true.....BUT I'm still faster than Gandalph the wondering wizard...

89XR7TD
03-27-2015, 06:01 PM
plus there is a free kit in blue springs mo. that is brand new and on a 95 that I can help my self.
the owner will never no it's gone. his car dose not going any where.
it's always on the trailer.

Duane will see it missing when he disconnects the battery tender lol...:)

Jacob_Royer
03-27-2015, 08:58 PM
duane will see it missing when he disconnects the battery tender lol...:)

ouch!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!:d

Nettlesd
03-28-2015, 09:48 AM
plus there is a free kit in blue springs mo. that is brand new and on a 95 that I can help my self.
the owner will never no it's gone. his car dose not going any where.
it's always on the trailer.

Ha, it's not even on a trailer.

Nettlesd
03-28-2015, 09:48 AM
Duane will see it missing when he disconnects the battery tender lol...:)

Do I even own a SC????

ganuolfthegrey
07-22-2015, 05:18 PM
Well i thought i would give a update. I bought new 60 pound injeinjectors. New cam from dalke. Engine is in advanced engine in salina. Getting new pistons and another set of new heads with more porting than before. Also swapping everything from my 89 to the 90 I Bought

Jacob_Royer
07-22-2015, 05:25 PM
Well i thought i would give a update. I bought new 60 pound injeinjectors. New cam from dalke. Engine is in advanced engine in salina. Getting new pistons and another set of new heads with more porting than before. Also swapping everything from my 89 to the 90 I Bought

I'm still faster...........

David Neibert
07-23-2015, 12:20 PM
Well i thought i would give a update. I bought new 60 pound injeinjectors. New cam from dalke. Engine is in advanced engine in salina. Getting new pistons and another set of new heads with more porting than before. Also swapping everything from my 89 to the 90 I Bought

Hope you're not swapping that wing :cool:

David

Jacob_Royer
07-24-2015, 02:46 PM
http://i20.photobucket.com/albums/b250/jacobroyer/10387792_1481589508743844_1337259575_a_zpsrknkpfv9 .jpg (http://s20.photobucket.com/user/jacobroyer/media/10387792_1481589508743844_1337259575_a_zpsrknkpfv9 .jpg.html)

ganuolfthegrey
07-27-2015, 04:57 PM
david the wing has been gone for along time know. I don't even have it.