EFI on an amerspeed 383ci 535bhp
Discussion
I'm a rank novice (it's worse than you think!)and am in the process on trying to decide on engine spec and like the idea of efi. Does anyone have any experience of setting up the injection system after installation, or know a man that can in the south east (uk)? or should I just stick to the carb and save myself two grand!
Well for simplicity it has to be a carb, no doubt about that. Or you could buy an engine with efi already fitted but if at a later date you want versatility and more performance or forced induction then you need a retro efi ecu which has to be mapped. I like the DTA, Motec and Autronic ecu's all of which, as you indicate may cost up to £2k once they are set up etc. The carb will cost a quarter of that.
I spoke to gale at amerspeed he was saying that he's spent two days mapping some of the higher horsepower engines, post installation, and seemed to think that there is a problem finding someone in the uk who could do this, or was he saying that no one at Ultima could? I wouldn't expect them to have the time or the inclination to do this anyway.
I'd like to think it shouldn't be that hard to find someone to map a newly installed motor of this sort? or would it?
I was also wondering if anyone had had their EFI pack up while the engine was under load? what would the resultant damage be?
I'd like to think it shouldn't be that hard to find someone to map a newly installed motor of this sort? or would it?
I was also wondering if anyone had had their EFI pack up while the engine was under load? what would the resultant damage be?
If it plain packed up then the engine would just stop.
If it went rich it would produce black smoke, foul the plugs and generally run bad but no damage.
If it went lean you would have very few clues. You may see the temperature rise or it may backfire. A thread on chevytalk had differing views on whether damage would ensue. most seemed to think that you would be aware of loss of power and investigate.
Steve
If it went rich it would produce black smoke, foul the plugs and generally run bad but no damage.
If it went lean you would have very few clues. You may see the temperature rise or it may backfire. A thread on chevytalk had differing views on whether damage would ensue. most seemed to think that you would be aware of loss of power and investigate.
Steve
I might be wrong but the Factory seem to be using all Carb motors, in there cars. I know Fi will always be better in alot of ways but the Edelbrock Fi system is cheep for a reason. $2000 Dollars complete is cheap, you can easly spend twice that amout on just the bolt on bits, with out an ECU. A Full MSD kit and Modified Holley are going to be just as much fun to drive, and well set up still get 15-20 mpg. Spend the money on the Brakes or wing !!!
There are lots of people around that can help install and configure a progammable EFI system. Although a big clockwork V8 has a certain appeal I like the idea of being able to optimise the performance of the beast in software - I've never got my head round tuning a carb and hope I never have to.
SBC fuel injection systems seem to fall into categories:-
1. Electronic carbs - single point injection systems that bolt onto existing carb intake manifolds and use a computer to regulate fuel and timing.
2. Multi point systems - using multiple injectors mounted on individual throttle bodies or using an intake manifold that has injector bosses for each cylinder.
The main expense of going for a decent setup based on multiple throttle bodies will be the cost of the throttle bodies, linkages, injectors and all the little twiddly bits - you would get very good results using a basic ecu like an Emerald, MBE or low end Motec - unless you plan on doing something really cunning with the electronics then you don't need a high end ecu. A suitable basic unit should be around £600.
You might want to have a trawl round www.kinsler.com - they have a decent amount of background information and lots of pictures of very tasty fi manifolds.
SBC fuel injection systems seem to fall into categories:-
1. Electronic carbs - single point injection systems that bolt onto existing carb intake manifolds and use a computer to regulate fuel and timing.
2. Multi point systems - using multiple injectors mounted on individual throttle bodies or using an intake manifold that has injector bosses for each cylinder.
The main expense of going for a decent setup based on multiple throttle bodies will be the cost of the throttle bodies, linkages, injectors and all the little twiddly bits - you would get very good results using a basic ecu like an Emerald, MBE or low end Motec - unless you plan on doing something really cunning with the electronics then you don't need a high end ecu. A suitable basic unit should be around £600.
You might want to have a trawl round www.kinsler.com - they have a decent amount of background information and lots of pictures of very tasty fi manifolds.
Gassing Station | Ultima | Top of Page | What's New | My Stuff