Pulley size and boost levels
Aug 5, 2014 | 08:58 AM
#21
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 .
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 .
Nov 24, 2015 | 09:20 AM
#24
Thread Starter
Moderator
iTrader: (20)
Joined: Feb 2006
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Likes: 62
From: South Shore, MA
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.
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.
Sep 14, 2017 | 10:25 PM
#25
TECH Addict
Joined: Nov 2015
Posts: 2,084
Likes: 552
From: Coastal NC
Are these numbers correct??? Sorry about digging up bones but these seem off from what I've been reading.
Sep 15, 2017 | 03:57 AM
#26
TECH Regular
Joined: Aug 2015
Posts: 408
Likes: 29
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.
Last edited by flatblack83; Sep 15, 2017 at 04:17 AM.
Sep 15, 2017 | 07:35 AM
#27
Well ****, 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.
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.
Last edited by 03sierraslt; Sep 15, 2017 at 12:31 PM.
Sep 15, 2017 | 08:09 AM
#28
Staging Lane
Joined: Nov 2009
Posts: 61
Likes: 2
From: Alabama
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.
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.
Sep 15, 2017 | 09:35 AM
#29
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.
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.
