I was thinking about putting the spacer under the blower and manifold is it worth it..Its been out awhile now was wondering if anyone saw true gains..If its a decent amount of power and can notice it than i want it.i have the maggie 2300 on my truck with about 9.5-10 psi..The truck vortec max made 542hp to the rear wheels ran a 12.8 et at 105mph..does this seem close or right..seems like maybe it falls off at the end of the quarter..maybe im wrong this is good..The truck is super fast flies but like to run low 12s..I never ported the runners out on maggie when i put it on i was told there very restrictive.i also have 4.10 gears, ls9 cam,1 7/8 arh headers.ANY SUGGESTIONS how much boost is good..Thanks guys..

 

The spacer makes a larger difference at higher boost levels, what heads are on your motor? Cath. or Rect.

Post up your whole time slip and we can see if its falling off on top or not. What converter are you running? Stock?

 

i have stock converter..I have the vortec max 6.0 the pretty sure these motors have the rec big heads..L76

 

If you have the L76 heads ( sorry cant remember at the moment) then I believe you can actually do quite a bit of porting to the lower manifold. I port matched mine but I have Cath. heads and there was very min. that needed cleaned up.

 

i will post time slip tomorrow..i have the L76 heads

 

I know it is not a direct comparison but there is a user on SilveradoSS.com that has installed an RDS spacer under his MP112 Magnacharger. I think the results speak for itself...

Ray's Custom Radix Spacer - Forced Induction and Nitrous - SilveradoSS.com

 

Do you have a datalog of your mid 12 sec run?

 

Mine runs 8-12 above ambient at cruise, if I really beat on it and get it nice and heat soaked from sitting then drive it again they will run about 18-20 over ambient until I drive a bit then they drop to 16 or so above. These numbers are cruise, naturally at WO they go up.

 

no data log sorry..thanks for the info..SHOULD i boost it up to 12psi or wont that help much..i have a boost a pump works great i have full fuel pressure..
The night i ran it it was cooler,but intake temps were 117degrees which i didnt think was the worst waiting in line awhile..

 

Thats not a bad time, but it definitely leaves something on the table. I assume you are running a stock tranny if you also have the stock converter in there. Seeing your 60' time would be helpful. That speed does seem a little on the low side for a truck with your mods, but the covnerter would help that too, and at 12# you could be adding as much as 40+ HP.

Also letting the blower cool down at the track to lower intake air temps would help you a lot too. It could feel sluggish at the end because its starting to pull timing due to your IAT climbing.