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Resurrection and development of V8 Project GT1


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Hahahha....  rings yes, but there was no need to any adaptions to the pistons.

BE shells I did not.  🙂

1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear)

1999 S350 #002 Esprit GT1 replica

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Lots of parallel tasks.  Just got the chargecooler radiator back following the addition of the 1/8 NPT boss for the burp tube.

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1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear)

1999 S350 #002 Esprit GT1 replica

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Yes, different location

1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear)

1999 S350 #002 Esprit GT1 replica

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Stock camshafts:

Inlet

Lift: 9mm

Duration: 245deg

MOP: 116deg ATDC

Opens: 6.5deg BTDC

Closes: 58.5deg ABDC

Exhaust

Lift: 8.15mm

Duration: 230deg

MOP: 104deg BTDC

Opens: 39deg BBDC

Closes: 11deg ATDC

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1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear)

1999 S350 #002 Esprit GT1 replica

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8 hours ago, jonwat said:

Those cam profiles look pretty vicious, what are they? 😃

 

 

As I understand the matter, those actually have the appearance of mild profile, typical of early Twincam and possibly the very common C profile on the 907's. What an aggressive profile would look like in comparison would show a more broadly rounded nose, reflecting more rapid increase of lift on lobe flank from start of event. Believe this recalls the explanation offered by Tony Rudd on how the "Sprint", or D, profile was superior to the preceding C profile although listed with near identical timing and lift.

Cheers

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Following the work that Andrä has put into different hardware and belt configurations, I received my v-belt in 1330mm length.  Need to get more engagement on the crank pulley.  By using the original belt tensioner fixing, an eccentric tensioner should do the job nicely.  

Lots to choose from so going for an equivalent SKF part for a BMW in 80mm diameter.

Checking with the standard tensioner pulley for measurement but if I`ve calculated that correctly, then I will have the necessary movement for the tensioning I will need.... 12€, so if I need another then so be it.

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1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear)

1999 S350 #002 Esprit GT1 replica

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Is that Power Steering pulley on the right?  Have you considered the electric power steering pump (i.e. Porsche or similar)  Not that $$ and simplifies the plumbing on a mid engine. 

 

Really enjoying watching you put this together!

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12 hours ago, Erikl said:

Have you considered the electric power steering pump (i.e. Porsche or similar)  Not that $$ and simplifies the plumbing on a mid engine. 

Although it`s an interesting idea, I`m going to stick with the Lotus/Saginaw pump. I know that Lotus did a lot of testing with different pumps/calibrations to get the right PAS feel.   I don`t want to have that impacted.

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1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear)

1999 S350 #002 Esprit GT1 replica

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Back out in the cold today.  Got the original lower valance back and installed.

The front carbon arch section fettled and fitted.

I will not be using the original front splitter, as it is forced to sit too high for road car usage.  I`ll be coming up with a decent compromise that will allow me to run as the desired height for the road. 

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1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear)

1999 S350 #002 Esprit GT1 replica

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9 hours ago, mike_sekinger said:

Although it`s an interesting idea, I`m going to stick with the Lotus/Saginaw pump. I know that Lotus did a lot of testing with different pumps/calibrations to get the right PAS feel.   I don`t want to have that impacted.

Yeah - the Lotus PS feel is amazing.  Before driving my car I had snooped around looking at the possibility of retrofitting the manual rack from an earlier Esprit...but the feel is just too good. 

I think one of the neat things about the electric pump set ups, especially the "race" version from Porsche is that you can turn a knob and adjust the boost to your liking.  Or maybe change for parking lot vs track day.  Curious to play around with it.   

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