The msd will likely fail and burn or lift a head long before that. Barring that...I would wager 6psi won't hurt that thing. But I went through it in 97 with a vortech...
I'm curious as to what the back pressure curve was running in comparison to the power curves? That thing is a total torque monster, even at the start of the run at 3500 it starts out at around 670-675ft.lbs. I largely ask about the boost/back pressure ratio cause I have a BBF 460 build going into a truck, and this pairing of large cubic inches and smaller twin turbos looks like a good combo for some good low to mid RPM torque production when needed.
Great video thanks. I have the 454HO but with an 8/71 and carbs. Similar boost. Runs very well but have been concerned about ring gap also. Did you find that you needed to open the rings up much from what came from the factory?
Hey thanks. I don't think extra ring gap was all that neccesary at this boost level and keeping IAT under control, but in the event that it got turned up with a better fuel, we decided to do it while it was in the shop.
Yeah sounds like a good idea. I think I’ll do it too along with welding the oil pump pick up on to the pump when I pull the engine again. I haven’t had my engine open yet. Hope you get a good run out of it. Best of luck
@@gmtgearhds1072 I'd like to think so. But it's a 90 fuelie engine and all the ford stuff is usually a let down on the dyno. I sure do love them though. Lol
I am running a similar setup. Gen6 454 twin 78/75 turbos. Holley super sniper and Holley hyper spark ignition. I’m having issues with the sniper EFI ECU burning up. I’m thinking it’s the hyperspark system, distributor, coil and ignition box. What ignition system are you running and have you had any issues with the sniper ecu. I want to have fuel and timing control through the Holley sniper. Thank you.
26 degrees of timing is pretty tame on pump gas, a buddy of mine runs 32 degrees of timing with a 7:1 compression ratio 565 cubic inch gen 4 big block running 10 pounds of boost from a non-intercooled whipple blower, now he is running the limit since he has iron heads but with aluminum heads he'll be able to increase the timing and be safe from detonation since the aluminum heads will dissipate the heat better than his current heads
@Bob Watters yeah, his FI is set up with two fuel systems so he can run a pump gas tune for street use then switch to C16 race fuel and up the boost to about 32 pounds
I got a built motor(Chevy big block) and tranny that have been sitting in my garage for about 10 years. What do I have to do to get it back up and running????
The best part is that in 100 thousand miles it will still be a reliable 630 hp engine.
The msd will likely fail and burn or lift a head long before that. Barring that...I would wager 6psi won't hurt that thing. But I went through it in 97 with a vortech...
The reason the actual boost achieved was different than spring crack open pressure was because of back pressure pushing on the gates.
Doing a similar thing with a big SBF. 427 TT with low boost combo in order to make a pump gas friendly street car. I like this type of build.
Just stumbled on this yesterday. Thank you it’s assume to me. Has given me another option.
I run a 1.25 exhaust housing on my 509 bbc to drop the back pressure but starting with 9.8:1 compression .
Single or twin?
@@kdsboosted4954
Twin 78)75 turbos
Very interesting and informative...thanks for sharing. Can't t wait for your install vids 👍
I'm curious as to what the back pressure curve was running in comparison to the power curves? That thing is a total torque monster, even at the start of the run at 3500 it starts out at around 670-675ft.lbs. I largely ask about the boost/back pressure ratio cause I have a BBF 460 build going into a truck, and this pairing of large cubic inches and smaller twin turbos looks like a good combo for some good low to mid RPM torque production when needed.
Great video thanks. I have the 454HO but with an 8/71 and carbs. Similar boost. Runs very well but have been concerned about ring gap also. Did you find that you needed to open the rings up much from what came from the factory?
Hey thanks. I don't think extra ring gap was all that neccesary at this boost level and keeping IAT under control, but in the event that it got turned up with a better fuel, we decided to do it while it was in the shop.
Yeah sounds like a good idea. I think I’ll do it too along with welding the oil pump pick up on to the pump when I pull the engine again. I haven’t had my engine open yet. Hope you get a good run out of it. Best of luck
Hell yes! I had a stock 460 eat a ring at 22psi with a borq s366. Wondered how much power it was making.
Im betting it was a LOT
@@gmtgearhds1072 I'd like to think so. But it's a 90 fuelie engine and all the ford stuff is usually a let down on the dyno. I sure do love them though. Lol
I've been thinking about building a 454 with twin turbos instead of a blower. If i can just fit it in an S10, it's game on! 😂
pretty cool, a bigger cam and springs would really wake her up
I'm doing the same thing with my 98 chevy 3/4 ton are those stock heads
Excellent job. New subscriber here
I have lookin for twin turbo 460 can I expect these numbers to be similar
No blow off valves? 😮
👍👍👍
I am running a similar setup. Gen6 454 twin 78/75 turbos. Holley super sniper and Holley hyper spark ignition. I’m having issues with the sniper EFI ECU burning up. I’m thinking it’s the hyperspark system, distributor, coil and ignition box. What ignition system are you running and have you had any issues with the sniper ecu. I want to have fuel and timing control through the Holley sniper. Thank you.
What sort of power are you getting ? Im building a gen 6 myself
Do you have the link to the turbo kit??
Seems like a shitton of timing on pump gas. Now it needs an intercooler and e85.
26 degrees of timing is pretty tame on pump gas, a buddy of mine runs 32 degrees of timing with a 7:1 compression ratio 565 cubic inch gen 4 big block running 10 pounds of boost from a non-intercooled whipple blower, now he is running the limit since he has iron heads but with aluminum heads he'll be able to increase the timing and be safe from detonation since the aluminum heads will dissipate the heat better than his current heads
@Bob Watters i realize i should have been more specific in my previous comment. 7:1 is his DYNAMIC compression ratio. His static ratio is about 9.8:1
@Bob Watters yeah, his FI is set up with two fuel systems so he can run a pump gas tune for street use then switch to C16 race fuel and up the boost to about 32 pounds
It's not at all.. I run 30 on pumpgas with 6lbs of boost for the street tune. Works great. Never had a problem
Do you put this same setup on people's trucks
I haven't, but Id like to
I got a built motor(Chevy big block) and tranny that have been sitting in my garage for about 10 years. What do I have to do to get it back up and running????
I'm sure it wouldn't take much more than some motivation they're normally pretty easy to get going. Don't let it go to waste
Get off the couch and stop watching RUclips
THAT’S where I left my engine! Can you send it back to me? Thanks;)
Haha 😅
What are you referring to when you say MAT
Manifold Air Temperature
Hi, your video is great and the project is of great interest to me, I wonder if we could do something together when we have this opportunity?
That's not a stock motor that's all forged internals the ring Gap ain't the only thing come on now
He said it’s a factory HO
That means high output
L21 Gen VI 454 Vortec engines came with forged internals in RV/commercial applications