So I bought a 69 convertible with a 468 4 speed. I’m pretty sure the carb is too big for the motor and was thinking of going to an EFI set up. Has anyone used the new Aces EFI yet? Reviews look pretty good. Want reliability. Which one should I look at?

 

How big is the carb? Why do you think it is too big?

The Aces has not been on the market long enough for me to even see one in the field.

Jebby

 

I bought their MPFI system but I have yet to install it and test it out.

I figured I would take the chance since I can easily convert the system to a mega squirt if the ecu fails or I don’t like the tuning software.

 

They have some cool products at great prices, after looking through their website! The SBC MPFI system is really interesting at $1800! Hopefully we can find some more reviews from users on here.

 

I agree with Jebby. Generally there is not a carb too big, only a carb that is improperly jetted.

 

So I asked the guy I bought the car from. Says it’s an 850 Quickfuel holly. Is this carb too big for the street? How would I go about tuning and trying to get the raw gas smell down.

 

I'm thinking Lars may have had a Holley setup paper.

 

Depending on the engine build, you could be spot on with an 850 cfm.
If it’s a mild build and you just cruise, a 750 cfm would work good on the street.
Either one, if tuned and jetted properly would work fine.

 

The Ace EFI looks like a knock off of the Edelbrock ProFlow. There is only $300 difference between the Edelbrock and Ace kit. Both require fuel pump upgrades. Id be curious to know if either kit fits under a stock C3 hood.

https://www.edelbrock.com/pro-flo-4-...nes-35690.html

 

I like the proflo 4.. you can make changes right from a tablet or phone. I use the eldelbrock sump pump, its mounted next to my overflow.. In the pic shown, I mounted it on the firewall, I moved it from there as there was to much heat..

 

that 850 should be fine with that Air Gap intake manifold you just need to get a QF rebuild kit unless you want to spend a lot of money

 

Seeing the fuel sump and all the hoses in the engine compartment makes me wonder how hot the fuel gets before getting burned. I prefer to give my engine the "coolest" (temperature) fuel I can so I insulated the hose coming from the in-tank fuel pump module all the way to the throttle body. The last 10' before the throttle body have a fire proof insulation over the thermal DEI tube insulation. The cool fuel helps make power with the cold air intake from the L88 hood. The fuel line is connected at the firewall end of the throttle body and comes into the engine compartment over the bell housing near the frame. Running 12.25-1 compression it is important to keep the engine from detonating and the cool air really helps all by itself. The air box part of the L88 hood is really important for the L88 to run on the streets and allows me to use pump premium. Anybody using a L88 style hood should try using the air box as well as it was the secret used by GM in the early 1960's to make power for their race cars. Cooler air ROCKS and the engine purrs.

I switched my 1968 C3 Convertible BB Corvette over to a Holley EFI system. I have the Stealth Sniper and it was easy to set up on my high compression 427. Even with a Edelbrock Dual Plane Air Gap intake I can still close my L88 hood over the throttle body and it seals to my hood. The throttle body fits exactly where the carburetor does. The standard Sniper has the throttle body turned 90* from the mounting position of the Stealth Sniper. When many folks see my engine very few can see the EFI parts, the engine appears to have a Holley Double pumper on it.

Holley offers cables and accessories for the Stealth Sniper, I ordered their progressive throttle cam and the cables to hook it to a laptop. Normally when I drive the car I have the laptop display showing all the various parameters in live time as it helps me know what is happening. I like the display information so much that I am planning on installing a 7" touchscreen on the dash to allow access to far more than the gauges in the upper center console can provide.

I wish you all a very Merry Christmas and a wonderful New Year full of Corvette memories to be made.

The price of the EFI system made a big difference and when I bought the Holley system I bought the Stealth Sniper, Fuel Tank Module, Cables to connect the PC and pressure gauge along with the installation kit for $1700. It was delivered in 2 days and it came with 2 YEARS of awesome Tech Support. If you are open to looking I would highly recommend efisystempro.com as they are really a great resource since they employ Holley Tier Three technicians to assist you. The tech support alone makes it a good deal and I have received nothing but the very best in support from EFISYSTEMPRO.COM.