How much of a gain is a spacer really worth? I am reading mixed reviews online, I figure since I am running an open port intake design, I should buy an open port spacer? Any advice?

My set up:

LQ9 408
12:1 Compression
L92 heads ported/polished/valve work
Victor Jr Intake ported to match heads
TSP 251/259 66x/66x/ 114+3
MSD Ignition (6010) thru truck coilpacks
Built TH350 w/ stall appropriate for nitrous
Nitrous at a later date.

All in a sub 2900lb notch mustang.

 

2" hvh super sucker 4 hole would be my opinion to try out.

 

im sure even a 1in hvh sapcer would improve also, if dont have celarance for a 2in. but 2in. would be better

 

Increasing high end velocity usually helps, a thicker spacer would be key, the only way to tell is to run a couple back to back trials with and without, different setups respond differently.

 

[QUOTE=ZONES89RS;13903019]Increasing high end velocity usually helps, a thicker spacer would be key, the only way to tell is to run a couple back to back trials with and without, different setups respond differently.[/QUOTE

I had dyno proven the difference tonight the difference of no spacer and the 2in. cnc'd HVH spacer. With out a doubt best money spent on the spacer low end power and tq increased for approx 3000rpm's by 30hp and 21tq to the wheels!

 

Good to hear, i am assuming what my next purchase will be now,LOL.

 

I use a 4 hole to help increase the carb signal in the lower rpms.

 

that's what this is but is cnc'd out on the bottom looks sick performs like i can't believe never thought that it would make that much of a difference.

 

Im kinda new at the carb thing. Is there a certain spacer or just any 2" spacer will work? Where to buy?

thanks

 

they are talking about a HVH Super sucker spacer. it is different than a basic open bore spacer and the hvh has been proven to work very well in most engines with long duration cams. stronger carb signal in low rpms
there are actually various versions of it. and even made from phenolic plastic material. can buy them at jegs, ebay, etc.

 

So, what is the best, cheapest version of this? I need one

 

I don't know mine's aluminum and cost $100 next door at the engine builder's shop

 

just look up tapered** carb spacer on jegs/summit they're available for around 70-100

 

I would like to see those dyno sheets because that sounds like an incredible amount of increase. If this is in fact the case the manifold was way too small in the plenum to start. I would not expect these kind of gains on every engine. What is your engine/application?

 

I only printed off the final run but i can get the before spacer and after spacer runs tonight. The gains that it made were incredible really made a major difference under 4k as the rpms went up it the gain dropped off some to only a peak 4 hp gain but at the track all that extra power is what's needed in my set up.

Stock LS1 346ci. from 2002 Camaro SS
New bearings and rings
ARP Rod bolts
ARP Head Studs
Vic JR. Intake, Cleaned the runners up
853 heads that have been extensively ported intake and exahust runnners, bowls everything, 5 angle valve job, milled 0.040
had to fly cut the pistons to clear the cam
Thunder Racing' T-Rex cam
SLP 25% underiven pulley
Comp Cam push rods
Patriot GOld Spring kit set up for the cam
Truck coils
Autolite plug wires
NGK TR6's gapped at 0.050
The shortie headers
H3 oil pan
nitrous converter
TH400
big drive shaft with the 1350's
ford 9in with spool and 5.13's
moser axles
MT DR's 275/60/15's on weld pro stars

oh and a 2in. HVH spacer now..lol

 

crap i left out it still has stock style water pump and stock rockers.

 

Im curious about track numbers. I thinking seriously about getting one. Which one would you guys order if your running a nitrous plate?

 

Me too. I'm taking it to the track tomorrow for runday sunday can't wait to see if it makes a difference at the track.

 

I put an air raid spacer on a 92 chevy truck with throttle body and the torque was very noticable gain.

 

TBI is junk, the efforts you make are only noticed in torque, it sucks you cannot tune that stuff worth a damn.