Good deal Rob , glad ya got the 8 rib on now , feels like a superman mod doesn't it ? Lol .


You already know but with my 1900 , 10% OD IW crank pulley , Custom IW 2.5 blower pulley /8rib I make 202-205 Kpa ( 15psi)

You will gain boost also with the meth spraying .

Oh wow I actually didnt know that...

Bout 1/2 a # or so give or take brother .

Figured I would bring this one back from the dead with my new combo.

I have a 370 with TFS 255 heads and a fairly big cam. It has 4* of overlap on the tail end of the exhaust stroke up to TDC. I now have a jack-shaft front inlet TVS2300 with 20% OD rear cogs, a 3.4" pulley up front, and the 10% OD powerbond lower pulley. All that works out to be approx a 2.83" pulley with the 10% OD balancer. I see 205-206kPa in cold weather, or about 15.5PSI. I also run a ported 90mm LS2 throttle body at the moment and I think this may be a restriction.

Are these numbers correct??? Sorry about digging up bones but these seem off from what I've been reading.

Since this was restarted i'll add mine, 03 6.0 1 3/4 stainless works headers, 3 inch dual exhaust, 220/232 cam, 10% od, tvs1900 with a 2.6 pulley i see 14.5 psi in cool temps.

Well shit, here it is again.

370, 10.0-1cr, TEA 225 heads, Cam is +6 overlap. 8rib, 10% OD, 105mm throttlebody,5” intake.

Same TVS2300 with a 5/8 phenolic spacer.

2.8 pulley- 15.5-16psi
2.6 pulley- 17.5-18psi

Boost curve doesn’t vary more then 1kpa through pull.

Well, since it was brought back to life i will add mine this time.

5.3 with Stage 2.5 heads and a 228/228 cam, long tubes and 2.5" dual exhaust, MP122 with the smallest pulley - I think 2.7". Makes 13-14 psi - depends on the temps. Meth with a 10gph nozzle and the Killa Chilla to keep it cool.

I'll add mine

5.3L with ZL1 ported blower only, LS3 TB, with PRC 2.5 heads, 1 3/4 Headers, true dual 3" exhaust, 229/246 116, 2.45 Pulley, stock crank Pulley reads 10PSI on my gauge.

Going to get 10% OD Pulley and griptech my 2.45 pulley, direct port meth.

I love seeing this come back to life.