408/ETP Small bore/Hi-Ram/F1x/4L80e
07-20-2013, 09:26 PM
#1
408/ETP Small bore/Hi-Ram/F1x/4L80e Well, I'm sure a lot of you remember this car as it was a hot topic a while back when I posted the dyno numbers after this customer of mine swapped camshafts and picked up over 100rwhp in the process.
Well, he's back! Aaron took the car to a local dyno day where he tossed it on the rollers just to see what it would do. The car was not there for max power extraction or to put down a record number. His tuner wasn't even there. In fact, the tune he had in it was tuned for 16psi and the boost it put down was closer to 22psi. To combat the obvious amount of fuel that needed to be added he raised the base pressure on his BRFPR in an attempt to give the car more fuel. As you can see by the dyno graphs, it worked until the massive amounts of VE this engine produces kicked in at 7000rpm and it said "I need more fuel!"
Blower motors require a metric crap ton of fuel, and this one is no different. If the fuel had been there, he was going to take it up to 7500rpm to really see what it would do, but unfortunately it just wasn't in the cards for today. With proper fueling it should pick up a large chunk of power. Along with taking the RPM up to 7500rpm I think 1200rwhp is easily attainable through the power robbing 4L80E and S60 rear end.
Run down of the combination:
408 iron block
10:1 compression
ETP small bore LS7 heads
Un-ported Holley Hi-Ram intake
Procharger F1X blower@22psi
243/263 .623"/.632" 115lsa Tick Performance Custom Blower Camshaft
4L80e trans
Strange S60 rear end 3.54 gears
FIC 127lb. Bosch Injectors
Magna Fuel 750 in custom sheet metal tank
I know there are some Corvettes out there running more boost, and more motor making higher numbers through 6 speeds. I don't expect this car to ever dyno really well just because of the 80e and 5th gen drive-train on top of a Strange S60 rear end(has to be one of the most power robbing rear ends in existence), but it runs very well on the street and hopefully soon at the track. Just looking at the power curve though, this engine is begging for about 500-750 more rpm and the added boost/power that will come with it. I'm not sure how it is pullied, but I would think it should make another 1-2psi with the added 500-750rpm.
Well, he's back! Aaron took the car to a local dyno day where he tossed it on the rollers just to see what it would do. The car was not there for max power extraction or to put down a record number. His tuner wasn't even there. In fact, the tune he had in it was tuned for 16psi and the boost it put down was closer to 22psi. To combat the obvious amount of fuel that needed to be added he raised the base pressure on his BRFPR in an attempt to give the car more fuel. As you can see by the dyno graphs, it worked until the massive amounts of VE this engine produces kicked in at 7000rpm and it said "I need more fuel!"
Blower motors require a metric crap ton of fuel, and this one is no different. If the fuel had been there, he was going to take it up to 7500rpm to really see what it would do, but unfortunately it just wasn't in the cards for today. With proper fueling it should pick up a large chunk of power. Along with taking the RPM up to 7500rpm I think 1200rwhp is easily attainable through the power robbing 4L80E and S60 rear end.
Run down of the combination:
408 iron block
10:1 compression
ETP small bore LS7 heads
Un-ported Holley Hi-Ram intake
Procharger F1X blower@22psi
243/263 .623"/.632" 115lsa Tick Performance Custom Blower Camshaft
4L80e trans
Strange S60 rear end 3.54 gears
FIC 127lb. Bosch Injectors
Magna Fuel 750 in custom sheet metal tank
I know there are some Corvettes out there running more boost, and more motor making higher numbers through 6 speeds. I don't expect this car to ever dyno really well just because of the 80e and 5th gen drive-train on top of a Strange S60 rear end(has to be one of the most power robbing rear ends in existence), but it runs very well on the street and hopefully soon at the track. Just looking at the power curve though, this engine is begging for about 500-750 more rpm and the added boost/power that will come with it. I'm not sure how it is pullied, but I would think it should make another 1-2psi with the added 500-750rpm.
Last edited by Sales@Tick; 07-20-2013 at 10:19 PM.
07-21-2013, 04:34 AM
#2
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do you recommend a cr of 10:1 vs a 9:1 setup? also, i am assuming he has the capable hardware to supply more fuel. were you referring to the tune needing to send more fuel if the tuner was actually there? sorry for the questionnaire
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07-21-2013, 11:51 AM
#9
His tune was never touched during the dyno pulls. He adjusted the base pressure of his fuel pressure regulator. In turn adding more fuel as the injectors flow more fuel at a higher pressure. He has such a large fuel pump that he is able to do this. Honestly though, the injectors are WAY to small. He's currently seeing well over 120% IDC at these power levels. He has mentioned seeing even higher IDC% when he applied belt dressing to the blower's drive belt at other times than this. This car will make every bit of 1300rwhp+ in my mind turned all the way up, but the heads won't hold that kind of pressure in the cylinder without pushing water.
I honestly do not know. I will have to ask the owner.
I know you know all about the 80e and it's losses! That S60 is meaty, but it's a killer in the power making department!
I'll post the video from TX2K13 here shortly.
Video supplied by StangKillr from TX2K13:
