intake manifold choice?
 

like some inputs
When bought the boat last summer it had a Team G single plane#7524 for dominator set up with a flange adaptor,and a Ultradyne 284/292 [email protected] 230/238 valv lift .601/.601 LSA112* ICL108*,cam need to be replace and decided to go with the isky and to also replace the intake manifold. the power band was a bit sloggish from 2000 to 3500.was running 5400 WOT and hope to maintain it.

combo is a cat boat awesome fx260 approx 4000 lbs,bravo one xr 1.5 ratio.ZZ502,comp 9.6 to 1,alum. 390 oval port with light work around pocket(clean up and angle seat)2.25 in.1.88 ex.valves.cam iskyHR 275/284 [email protected] 228/238,val lift .553 .578 LSA112*,changing spings,lifters,push rods all from isky,and have roller rockers(crane).dist HEI ,carb 850 dp mec.,Exh.Litghning header.
Was thinking of going with the Air Gap dual plane?
planning to run WOT around 5500.
so wath you guys think of this swap?
thank's JP

Re: intake manifold choice?
 

I had a similar setup with the air gap intake with a little bigger cam and carb. Wasnt bad but seem to flatten out on the top a little. Went with a Merlin single plane, 1" spacer and a demon 850. Woke it up quite a bit in mid range and saw a little increase on top. Your cam seems a little small on the lift. My boat was a 27' V bottom at about 4500 lbs.
Dan

Re: intake manifold choice?
 

interesting to hear,i was told by a couple friends to go with a little less cam and would do better.this is all new to me like i said before just got this boat last summer and only put about 4 hrs to it.

Re: intake manifold choice?
 

DanB,

Did you use an open spacer??

Re: intake manifold choice?
 

Yes, run the Air Gap on those heads.

Chris

Re: intake manifold choice?
 

not sure if you can call it open,it's home made or modified and about 1/2" thick and 4 holes shape open in centre and it sit off centre toward the back.

Re: intake manifold choice?
 

wy with those heads ?
thank's for the advice JP.

Re: intake manifold choice?
 

notice in other threads lots of talk about spacers,how do you know you need one ?is it a HP/TR bolt on or just used for fine tuning ?

Re: intake manifold choice?
 

Air gap is designed for 6500 rpm. It is a nice match to the GM ovals. Manifold will widen the powerband out and give you more useable power.

Chris

Re: intake manifold choice?
 

thank's for the clarifition.
JP.