Lotus 907 Carb recomendation
Discussion
Hello, I am a new owner fo a 74 Jensen Healey with the 2 ltr 907 Lotus. I am looking for recommendations on Dellorto 40mm carb component recommendations. I am a rookie and will likely have the carbs professionally rebuild unless I can find a club in the Minneapolis MN USA area to Join. If it matters my elevation is about 1,000 ft above sea level. I will be driving on weekends in all type of traffic but expect mostly crusing between 50 & 75 mph at lower and middle range rpms. Doubt I'll ever go above 5k but who knows? I am also looking for a source to purchase an intake manifold to allow mounting the carbs. Any and all suggestoins are welcome. Thnaks for your help. John
plenty of goodies on here for you
www.dellorto.co.uk/
also a good site for giving the basic's on tuning carbs it may be for a esprit but all the lotus engines from 907 - 912 use DHLA Carbs there are some differances but tunning them is essentially the same for all varientswww.unity1.co.uk/Lotus/index.html
www.dellorto.co.uk/
also a good site for giving the basic's on tuning carbs it may be for a esprit but all the lotus engines from 907 - 912 use DHLA Carbs there are some differances but tunning them is essentially the same for all varientswww.unity1.co.uk/Lotus/index.html
alibop said:
I am a rookie and will likely have the carbs professionally rebuild unless I can find a club in the Minneapolis MN USA area to Join. John
John,
Your in luck. Just so happens there is a very active Lotus group (LOON, Lotus Owners Of the North) in the Minneapolis area with several guys who are experts w/Dellorto carbs.
Go here and contact these guys and see if they can help you.
http://autos.groups.yahoo.com/group/loon-mn/
Tim Engel is the Secretary of the club and one of the most knowledgeable guys anywhere when it comes to the Lotus 9XX engines.
Jim Knowles
95 S4s
long distance LOON
Want to know a secret?
A pair of well setup 175CD Strombergs will flow 350-400 CFM, which is all your motor needs. The Dellortos and the Webers sound better, and are probably have a bit better throttle response as I think they have an accelerator pump, but overall (and for the price) the Stroms are VERY underrated.
Most of the "carb" issues and bad talk related to Stroms are either due to ignition issues, or worn out parts on the Stroms (which are very easy to rebuild).
I'd stick with the Stroms if they are on the car and not purchase Dellortos. If Dells or Webers are on teh car, go for it. They certainly look better....
BUt the Srom is a rugged, tough old carb.
A pair of well setup 175CD Strombergs will flow 350-400 CFM, which is all your motor needs. The Dellortos and the Webers sound better, and are probably have a bit better throttle response as I think they have an accelerator pump, but overall (and for the price) the Stroms are VERY underrated.
Most of the "carb" issues and bad talk related to Stroms are either due to ignition issues, or worn out parts on the Stroms (which are very easy to rebuild).
I'd stick with the Stroms if they are on the car and not purchase Dellortos. If Dells or Webers are on teh car, go for it. They certainly look better....
BUt the Srom is a rugged, tough old carb.
alibop said:
Hello, I am a new owner fo a 74 Jensen Healey with the 2 ltr 907 Lotus. I am looking for recommendations on Dellorto 40mm carb component recommendations. I am a rookie and will likely have the carbs professionally rebuild unless I can find a club in the Minneapolis MN USA area to Join. If it matters my elevation is about 1,000 ft above sea level. I will be driving on weekends in all type of traffic but expect mostly crusing between 50 & 75 mph at lower and middle range rpms. Doubt I'll ever go above 5k but who knows? I am also looking for a source to purchase an intake manifold to allow mounting the carbs. Any and all suggestoins are welcome. Thnaks for your help. John
John,
I am in St. Paul and would be happy to assist you in rebuilding them. I have rebuild several pairs of Dellortos both on Esprits as well as several JH. Contact me offlist. Also, the LOON's are not the only Local Lotus Club. There is also a club known as the LotusEaters. We have numerous JH owners. Personally, I wouldn't belong to the LOONs, but that said, there are a few good guys in their club.
Happy Motoring!... Jim'99
PS BTW, is you JH Red and formerly from TX? I know this car!
>> Edited by lotusguy on Tuesday 23 August 16:07
Squelch said:
Don't know if your interested, but I happen to have a complete set of carbs and intake manifold off of a 1986 Excel 912 engine in excellent condition.
912 is the "newer" version of the NA 907 engine.
The 912 is also a 2.2 rather than a 2L, so you'd probably need to re-jet the carbs...
alibop said:
Hello, I am a new owner fo a 74 Jensen Healey with the 2 ltr 907 Lotus. I am looking for recommendations on Dellorto 40mm carb component recommendations. I am a rookie and will likely have the carbs professionally rebuild unless I can find a club in the Minneapolis MN USA area to Join. (Snip)...
Hi John,
Welcome to the LOON... it's good to have you aboard.
I have the Jensen Healey workshop manual as well as the Dellorto specs for all the J-H and Lotus 907/912 configurations. I can send them to you via e-mail if you wish. It's a rather large file so I won't forward it unless you ask.
Better yet, would you like to get together sometime soon (like this weekend) to check out your new toy. I can give you the info then and we can make a shopping list of bits you will need to get the car on the road again.
Plan on all the rubber hoses, belts and seals. Especially the timing belt and brake calipers/ wheel cylinders. After 15 years of sitting, the brakes will probably require a complete rebuild in order to be safe and reliable.
Neither the Dellorto nor Zenith Stromberg carbs are difficult to rebuild, and we can help you do the job without paying for lots of shop time.
The Strombergs don't deserve the negative press they seem to get and there's no compelling reason to dump them. However, Webers or Dellortos will give a much more crisp throttle response... the engine will feel more eager even if there isn't much more power showing on the dyno.
The big benefit with Dellortos over Strombergs (more so than Webers) is that the fiddle-factor goes way down. Once you get them set properly, they require very little tuning or maintenance. On the other hand, it seems like Strombergs need constant tuning.
Since you have the Dellortos, put your effort and money into them. I'm sure you will like them.
Let me know when you would like to get together to lean over a fender. I'll take this thread to the LOON mailing list since there are some other members who would like to get their hand on your car too. It could be fun.
Regards,
Tim Engel
Lotus Owners Oftha North
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