free hit
counters
Elite 1975 engine upgrade / cylinder head swap - Engine & Ancilliaries/Gearbox - The Lotus Forums #ForTheOwners Jump to content


Elite 1975 engine upgrade / cylinder head swap


Recommended Posts

Hi everyone!

I want some engine upgrade, hope You can help and share your expirience.

I have 1975 elite with 907 engine. 

I want to upgrade cylinder head and do other upgrade for top of the engine.

Im not looking for competition set up but for some increase power about 20+ and more smooth torque characteristics and overall better engine performance like: good start, reliability ect. 

I dont want to rebuild engine block and go for 2,2 and do turbo cause it looks out of my budget. 

Compresion is: 12; 12,8; 11,3; 11,2 (bar). Engine was cold when checked and 3 and 4 cylinder have spark thread issue to solve so it might be better. 

Fuel presure is: 1,2 bar (before carb)

Exhaust diamension is: first bigger one 1 1/2 ” after spliting each 1”.

  1. What are the pros and cons of lotus Exel 180Hp cylinder head direct swap to standard 907 engine ? Is it a good idea ?
  2. Any ideas for 907 Cylinder head rebuild? Not like huge budget but my friend  do so some metal working on sport cars so he may help if needed.
  3. Is there anything worth doing with carbs components appart from rebuild and good setup?
  4. Is there any resonable option for upgrading ingition system?
  5. Any thing more to take care regarding top of the engine?

 

Thanks for help.

Paul

Link to post
Share on other sites

Upgrade today to remove Google ads and support TLF.
  • Replies 6
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Posts

You could skip electronic ignition and go straight to coil packs, and ecu with a 3d map

Your fuel pressure is way too high for carbs, should be 3-4psi(0.25bar approx).

Electronic ignition is very easy. No power increase but easier starting and smoother.

Excel HC had different tri-jet carbs as well.

Good luck with your project

Link to post
Share on other sites

I think you would get better performance/drive-ability by leaving the head as standard and going to 2.2l with 104 cams and Excel SE pistons.  Still wouldn't be too costly if you buy good used parts.

Where do you live?

Pete 

Link to post
Share on other sites
19 hours ago, EXCEL V8 said:

I think you would get better performance/drive-ability by leaving the head as standard and going to 2.2l with 104 cams and Excel SE pistons. 

Where do you live?

Can I swich to 104 cams without changing the valves, valves springs, buckets, ect?

Can I instal exel se  pistons without changing crankshaft and con rods?

I live in Warsaw Poland, but visiting UK often.

 

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.



Upgrade today to remove Google ads and support TLF.


×
×
  • Create New...