408 roots blower build
09-10-2011, 10:45 AM
#93
Got the issue resolved and got it running. Had to leave town for a wedding. So shooting for Sunday to dyno now. Confirmed the current setup is 10psi boost. So other set up should be 17psi. Just running it steady at 2,600 rpm it started building ice on the injector hat and blower was cold to the touch. Have to love e85 and methanol for that.
With too much ice build up the butterflys could stick on u. Got to love ethanol.
09-11-2011, 08:22 PM
#94
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Well i have a kick *** looking engine atleast. Well the engine didn't make near as much as i thought. With the roots blower i knew it wouldn't be a power horse but i'm not impressed much. Anyways here's the results.
6 lbs boost 25* timing 9.0 A/F ratio 88degrees AIT start to finish of pull= 705.2HP@6,500rpm 664.4TQ @4,700 rpm.
9 lbs boost 23* timing 8.5 A/F ratio 126 degrees start and 162degrees AIT end of pull= 732.5HP@6,100rpm 667.5TQ @5,200 rpm.
15lbs boost 17* timing 8.0 A/F ratio 183 degrees start and 209 degrees AIT end of pull= 722.9Hp@6,300rpm 678.3TQ @ 4,600 rpm.
Any input or suggestions? I have tomorrow morning yet to dyno if needed. I'll try to post dyno sheets and videos soon.
6 lbs boost 25* timing 9.0 A/F ratio 88degrees AIT start to finish of pull= 705.2HP@6,500rpm 664.4TQ @4,700 rpm.
9 lbs boost 23* timing 8.5 A/F ratio 126 degrees start and 162degrees AIT end of pull= 732.5HP@6,100rpm 667.5TQ @5,200 rpm.
15lbs boost 17* timing 8.0 A/F ratio 183 degrees start and 209 degrees AIT end of pull= 722.9Hp@6,300rpm 678.3TQ @ 4,600 rpm.
Any input or suggestions? I have tomorrow morning yet to dyno if needed. I'll try to post dyno sheets and videos soon.
09-11-2011, 08:36 PM
#95
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Iats are getting to you on the high boost pull, the low boost is pretty impressive! Try a high boost pull with some cooler iat's to start, looks like it was hot already.
09-11-2011, 08:38 PM
#96
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Also, how are you figuring those a/f ratios? My wideband still reads 11.xx wot because it goes off lambda and calculates it to a/f for gasoline, if that makes sense.
09-11-2011, 08:45 PM
#97
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My a/f ratio is off of the dominator ecu reading from the e85 fuel selection. The other a/f guage was reading off lambda but no datalog for that.
