Carbs v Injectors
Discussion
At 535 pounds plus vat you're most of the way to getting a proper 3D fuel / ignition controller on your car .. goto :
www.emeraldm3d.com
you can keep your std distributor and modify it (not ideal but it works) , or go for coil packs .. it *will* be more expensive, but you'll get the full management control you need to get the best from your engine .. why spend 535 plus vat and set-up time for only a carb fuelled mechanical advance system? makes no sense to me.
www.emeraldm3d.com
you can keep your std distributor and modify it (not ideal but it works) , or go for coil packs .. it *will* be more expensive, but you'll get the full management control you need to get the best from your engine .. why spend 535 plus vat and set-up time for only a carb fuelled mechanical advance system? makes no sense to me.
I did this conversion on my 350i in the summer. Although it has done less than 50 k it is 21 years old, and the injection system used at that time was not the best. Reliability was a major concern and after the second tow home the decision was made.I bought the 500CFM through RPI in Norwich, and their service was excellent. Conversion was very easy. The car is now lighter by a major amount, and i have no worries about electrical problems. Performance is unchanged from that i had with the injection system when it was at its best. Only noticeable change is that hot starting is not as good, but with a battery in boot conversion it cranks over ok until it catches. And the best bit, got close to £300 on Ebay for the old injection system, so the cost was less than £300 in total. Definately recommend it!!
The edlebrock/weber/carter combo or holley items are very easy to use and you can tinker with them on your driveway. They will give pleasing results.
The basic injection stuff is slightly better but very frustrating if you can't tinker with it yourself. I guess it's all down to how you plan to modify your car in the future and if you have support nearby should you need it.
I went from a holley to motec efi and it was a difficult learning curve. The efi had bells & whistles I didn't need back then so I should have stayed with the holley.
Boosted
The basic injection stuff is slightly better but very frustrating if you can't tinker with it yourself. I guess it's all down to how you plan to modify your car in the future and if you have support nearby should you need it.
I went from a holley to motec efi and it was a difficult learning curve. The efi had bells & whistles I didn't need back then so I should have stayed with the holley.
Boosted
No contest. Injection every time.
I ran a Holley on the SD1 Rally Car. PIA - Better off with a bucket with some holes in it. Went well but drank gas to get decent driveability. Ran Webbers on the TR8 - Needed constant tweaking to get it in balance.
Emerald is a good starter set-up but is a little primative. Better option is MBE as they have more experience in the market. IMHO.
However, better to use the standard flapper or hot-wire set up and get Mark Adams to do his magic and the car should be great.
I´ve used pretty much most systems and have much experience of Flapper, Hot-wire, GEMS, Bosch, Siemens, and loadsa after market stuff
Go for it
Injecvtions.
I ran a Holley on the SD1 Rally Car. PIA - Better off with a bucket with some holes in it. Went well but drank gas to get decent driveability. Ran Webbers on the TR8 - Needed constant tweaking to get it in balance.
Emerald is a good starter set-up but is a little primative. Better option is MBE as they have more experience in the market. IMHO.
However, better to use the standard flapper or hot-wire set up and get Mark Adams to do his magic and the car should be great.
I´ve used pretty much most systems and have much experience of Flapper, Hot-wire, GEMS, Bosch, Siemens, and loadsa after market stuff
Go for it
Injecvtions.
Tas,
That may be true for you but my TR8 loved the holley and I was able to set it up with all the trick parts. The engine was a 4.5 and then I fitted turbos which meant a change to a holley 600 double pumper. Again it was a doddle. From tests I've read, the carter carbs are as good as efi and again tweakable with a screwdriver etc. I wouldn't touch the multiple carb set ups, they are a pain in the butt!
When I got ambitious with my plans I got the Motec. It was a very good and expensive system but at the end of the day I didn't need all the sophistication. The carb with boost wasn't lacking anywhere. So, I concluded that for most applications the 4 barrel was a very realistic diy proposition but for those with more confidence the injection would be better so long as they can map it.
I don't rate the mbe system but the DTAfast has it all in my book. Very like the Motec in functions but much cheaper and with really user friendly software
For my blown lsx I shall be using a DTA.
Boosted.
That may be true for you but my TR8 loved the holley and I was able to set it up with all the trick parts. The engine was a 4.5 and then I fitted turbos which meant a change to a holley 600 double pumper. Again it was a doddle. From tests I've read, the carter carbs are as good as efi and again tweakable with a screwdriver etc. I wouldn't touch the multiple carb set ups, they are a pain in the butt!
When I got ambitious with my plans I got the Motec. It was a very good and expensive system but at the end of the day I didn't need all the sophistication. The carb with boost wasn't lacking anywhere. So, I concluded that for most applications the 4 barrel was a very realistic diy proposition but for those with more confidence the injection would be better so long as they can map it.
I don't rate the mbe system but the DTAfast has it all in my book. Very like the Motec in functions but much cheaper and with really user friendly software
For my blown lsx I shall be using a DTA. Boosted.
If you are starting from scratch a Carb set up is the most cost effective, but unless the injection system is shagged i would leave it.
Carbs are ok infact probably as good as some "throttle angle" injection systems, i've had plenty of V8 carbed engines and had no serious problems but i wouldn't bin the EFi for a carb.
Tim
Carbs are ok infact probably as good as some "throttle angle" injection systems, i've had plenty of V8 carbed engines and had no serious problems but i wouldn't bin the EFi for a carb.
Tim
not showing any bias at all here 
, the only way to go is carbs 
Then again, as 2Sheds says, part of it is down to cost effectiveness. When I had the engine upgrade done, my ECU was failing so, rather than get a new ECU and chip plus rolling road time, it was cheaper for me to move to carbs. John Eales also recommended them for the spec of engine (and the use it gets).
Anyway, injection shounds cr*p compared with the induction noise on mine during acceleration!!
, the only way to go is carbs Then again, as 2Sheds says, part of it is down to cost effectiveness. When I had the engine upgrade done, my ECU was failing so, rather than get a new ECU and chip plus rolling road time, it was cheaper for me to move to carbs. John Eales also recommended them for the spec of engine (and the use it gets).
Anyway, injection shounds cr*p compared with the induction noise on mine during acceleration!!
Joolz converted my Chim to emerald a couple of years ago ( still with dissy).
It runs fine with just one little hicup at 200rpm from a trailing throttle. but nothing another hour on the rollers wouldnt map out.
If you do go the emerald route i would recommed dropping the dissy. With high levels of advance we did get some odd readings probably due to the dissy crossfiring..
G
It runs fine with just one little hicup at 200rpm from a trailing throttle. but nothing another hour on the rollers wouldnt map out.
If you do go the emerald route i would recommed dropping the dissy. With high levels of advance we did get some odd readings probably due to the dissy crossfiring..
G
Gassing Station | Wedges | Top of Page | What's New | My Stuff