[907 valve stem installed height ?]

16 hours ago, PrecisionMike said:

Thanks for your reply. Did you ever find a specification for valve spring installed height or valve protrusion? On mine (912 na) my exhaust valves consistently protrude 0.5 mm more than the inlet. I solved shim range issue by using new thin pad steel long skirt followers .

Cylinder shop figured that out. Unfortunately I didn't get the specs. 

[907 valve stem installed height ?]

11 hours ago, PrecisionMike said:

Hi. Did you ever post the info you were after and got. I'd be very interested. Thankyou

Yes. Needed the valve stem height because i was installing new valves. Had to have the exhaust taken down 20thou and the intake 10thou to put me in the correct shim range. 👍

[Dhla 45s, front carb vacuum real high back carb fine. Solution ??]

Ok guys. Popped the bolts off and checked both choke/enrichment pistons.Both working and not stuck. Throttle plates are both in the same spot when closed. Checked those by looking at the progression holes. But my timing belt def jumped 1 tooth. Belt is back on correctly and checked the belt tension. Spun it 4 times and rechecked the tension every revolution. Will check all plugs before i start it shortly to make sure i have spark on all 4. Wish me luck and thank you for all the replies. Greatly appreciated.👍👍

[Dhla 45s, front carb vacuum real high back carb fine. Solution ??]

Thanks Lotusfab i,ll try that next. By air corrector you mean air bleed screws ? I have all 4 closed now. 

[Dhla 45s, front carb vacuum real high back carb fine. Solution ??]

drdoom, you could be right. Now how do i raise the vacuum on the aft carb ??

[Dhla 45s, front carb vacuum real high back carb fine. Solution ??]

This is still what i got. Not good. 

[Dhla 45s, front carb vacuum real high back carb fine. Solution ??]

Yes Steve V8. All good there. 

[Dhla 45s, front carb vacuum real high back carb fine. Solution ??]

Sparky i,m thinking butterflies. Carbs coming off now. 

[Dhla 45s, front carb vacuum real high back carb fine. Solution ??]

910esprit, even if i pull the front carb balance lever back the vacuum is pegged. It seems as if the throttle plates aren't closing all the way. 

[Dhla 45s, front carb vacuum real high back carb fine. Solution ??]

Ok checked mounting plates and manifold for leaks. No leaks. Rear carb vacuum is good. Nothing i do will bring the vacuum on the front carb down. When i give it some gas it comes down a bit but at idle the vacuum on the carbtune is pegged. Throttle plates ??

[Dhla 45s, front carb vacuum real high back carb fine. Solution ??]

Going to swap the vacuum tubes on the carbtune just to rule that out next. 

[Dhla 45s, front carb vacuum real high back carb fine. Solution ??]

Sparky, Didn't have the shafts out but will check the butterflies tday. 

[Dhla 45s, front carb vacuum real high back carb fine. Solution ??]

Yes carbs have all new gaskets o rings and acelerator pump diaphrams. Eurocarb kit. 

Lotusfab, Just checked and both screws are on the throttle balance lever correctly. Hmmm

[Dhla 45s, front carb vacuum real high back carb fine. Solution ??]

Sparky. Just did a valve job and new head gasket. Compression great on all 4

[Dhla 45s, front carb vacuum real high back carb fine. Solution ??]

Yes Sparky i know how to set them up. Just cant get front carb vacuum down to start balancing them. 

[Dhla 45s, front carb vacuum real high back carb fine. Solution ??]

Morgan Carbtune hooked up after rebuild and front carb vacuum pegged on the carbtune. Back carb is good. Thoughts ???

[Geotze head gasket stock studs torque specs ?]

Thanks Barry 👍👍

[Geotze head gasket stock studs torque specs ?]

Well that helped. 

[Geotze head gasket stock studs torque specs ?]

What are the torque specs and procedure for installing a Geotze head gasket with stock studs ?

[907 exhaust stud size and thread pitch needed.]

Replacing all mine and need the size to source them locally. Thanks in advance.

[Alunox NA full exhaust system. Anyone on here buy one ?]

lotus-62. Haven't heard of that one. I,ll check it out. 

[Alunox NA full exhaust system. Anyone on here buy one ?]

Looking for some info before i purchase one. How,s fit and is there any rejetting required with Dellorto,s. Thanks in advance.

[Coolant hose on cylinder head. Where does it go ?]

Thanks guys 👍Much appreciated.

[Coolant hose on cylinder head. Where does it go ?]

jonwat, The one on the head is what i,m trying to figure out. 

[Coolant hose on cylinder head. Where does it go ?]

Just put a new head on the S1 and the old head didn't have this hose. Looked in the manual and found nothing. Running Dellortos and the intake manifold has a hose coming off of it.