My Express van is actually under the knife this summer so to speak. I hurt the L31s short block. Its getting something ALOT more powerful, lol. Going to have to really get it dialed in well especially before I tow with it again. I am really going to push the pump gas running ability of a 23* small block.
I am working on a nicely built 383.
Right at 11:1 compression
Summit Racing 0.030" over 880 Vortec block
Eagle 1-piece rear main lightweight crank,
6" H-beam brushed rods with floating pins
Weisco forged flat tops with 2 deep valve reliefs
File fit rings 0.018 top and 0.016 2nd
SFI 8" Fluidampner milled for the 24x reluctor
GMPP Single roller timing chain
Fully balanced
Coated rod and main bearings
Lloyd Elliot Ported Assault Racing 205cc heads
2.02/1.60 valves and dual springs
7/16 screw-in studs and adjustable guide plates
Heads milled 0.020" for flatness
210cc ports 64cc deshrouded/polished chambers
Flow 274/190 @ .500 and 291/193 @ .600
4.030" x 0.38" MLS cometic head gaskets
Comp Cam 215/224 @ .050, 110 LSA, 106 ICL
0.578" intake and exhaust lift
1.7 Scorpion 7/16" non self aligning rockers
Short poly locks for added clearance
Rhodes variable roller lifters
Hardened 0.080" wall Comp Magnum pushrods
Aluminum centerbolt short valve covers
Stock steel ones won't clear the rockers
Slightly modified a/c compressor bracket
L31s a/c bracket will not clear LH valve cover.
Mercruiser dual plane MPFI intake port matched
Buick 3.8 SC injectors @ 58 psi for 42 lb/hr
102mm to carb elbow and matching 102mm TB
4" custom air intake
LS3 cartridge style MAF
Stock LS Van air cleaner with a K&N filter
Doug Thorley Tri-Y headers
Factory dual 3" exhaust piping
Thunderbolt 3" spun metallic core cats
Dual 3" in and 4" single out muffler
EFI connection 24x reluctor
Holley aluminum timing cover
Aluminum L31 distributor for cam sync
LS Truck D585 coils
1 meg 2005 LQ4 Van PCM (Blue/Green connector)
Flex fuel enabled with the Ethanol sensor installed
5qt truck pan
Windage tray, crank scraper and oil pump baffle
High pressure big block oil pump
March 3 piece 25% underdrive pulleys
Flowkooler Vortec truck water pump
GM 19.5" 11 blade fan on a standard clutch
34" wide 454/8.1 van radiator with oil cooler
170°F thermostat
Racetronix fuel pump
Racetronix fuel pump hotwire kit
Dual knock sensors
With any luck it will be in the 500 hp and 500 tq range on pump gas and 550 hp and 550 tq on E85 and be done making its power under 6,000 rpm. I am hoping to get over 400 at the wheels on E85 with the ability to still run pump premium. I also hoping to keep the fuel mileage decent on pump gas when my foot is not into it and I am just cruising. Since I have several E85 stations nearby I plan on running mostly E85 in town to help keep the engine free of carbon buildup. It will run cooler on E85 and the 104 octane should allow for a little more timing advance. E85 is over $1.00 a gallon cheaper than 93 which will help offset the 30-40% fuel economy hit.
I am having ATI build me a custom high str (2.2-2.3:1 STR) 2,800 rpm stall converter with a triple disc lockup clutch that can be locked reliably at WOT.
I had added a massive 40k gvw trucool trans cooler to it as well as a +3qt deep trans pan to help keep the trans cool.
With the Rhodes lifters I know it will sound like a solid roller cam but I want a very stock sounding smooth idle.
A very similar 10.5:1 383 LT4 build made 489 hp on an engine dyno and stump pulling torque using a carb for the dyno runs. It was also running mid 13s for air/fuel ratio rather than the 12.6 or so I have found E10 to generally run best at.
http://www.ellweinengines.com/ERE87/ERE87.htm
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