fitting a 84 crank in a case

[nicolas]

hey i am beginning to juggle around all the parts i have collected and it seems i have 2 options to go on. i have a very nice DPR 78 mm crank (vw journal) that i can use OR a also a DMS 84mm crank (also vw journal). but it seems to be a tight fit to have a large 84 crank fitted in the case... any ideas about this? i can also opt for a aluminium case which is thicker and could fit the crank better.

BUT what will be the benefit of the 84 compared to the 78? at first i was thinking of a pretty reliable 78x94 with a w130 cam and ported heads and so, but all pretty mellow as it would be a streetdriven type3 (allthough i would go with a type1 setup). but now it seems like i might as well opt for the bigger 84x94 combo while i am at it as i allready have the crank (with flywheel)and the pauter 5.5 rods. but i have no idea what cam i could use or what more trouble i am heading at. so please help me make this decision.

[Neil Davies]

Too much is never enough!

Several years ago I looked at 1776 vs 2007 motors for my Karmann Ghia street car, with the aim of running low 14's, and was advised to go for the bigger motor as it would be less stressed and make the car more driveable. I promptly ignored everything and built an FK89, 48IDA 2180cc motor instead!

[nicolas]

Too much is never enough!

Several years ago I looked at 1776 vs 2007 motors for my Karmann Ghia street car, with the aim of running low 14's, and was advised to go for the bigger motor as it would be less stressed and make the car more driveable. I promptly ignored everything and built an FK89, 48IDA 2180cc motor instead!

well i happen to ingnore some stuff too, that is basically why i bought the 84 vw journal crank  now i need to be able to run it. and a little of topic i am on the market for a good gearbox. something with a quaife diff... something that will hold and that i can afford at the moment. i just might sell the squareback to by a 5 speed, but i am not sure yet. if someone has something lying around at there shop they can split with i am taking offers  i hope to run better times by the next bug in or DDD... so all i need is a big engine and some sort of gearbox that keeps it together. the 5 speed idea is to keep the thing going on the freeway as it will be my only car than and i need to go on trips with the family as well. i know i cruise in style, my son is spoiled allready 

[richie]

With the 84 and VW journals its a very tight squeeze into a mag case,with those pauter rods I think you would break through the top of the case,I an ally case with raised roof no problems,just clearance the cam.You would realy want some rods witha 5/16 bolt to make it fit in the mag case.i used to have this set up.
the 84 stroke motor could runless compression,be more drivable with the same times at the track due to all that torque

cheers richie,uk

[Lanny Hussey]

My turbo car has an 84MM DPR VW journal crank/Scat 5.5"s w. 3/8" bolts. The 'Hi Roof' al case made it pretty easy, although the cam did need quite a bit of clearancing.

[Tobi/DFL]

Hi Nicolas,
you forgot to mention that those pauter rods are aluminium rods which require eben more space in the crankcase than the usual chromoly rods! I don´t think that those rods will fit in an magnesium case on a 84mm stroker crank. And I doubt it would be the most reliable combination. I would go with the 78mm crank if you really want to use those rods. I have a 2176ccm in my oval as well and it´s really driveable since it is jetted with the help of a LM-1 and it has enough torque end horsepower to move you sexy fastback a lot faster down the quartermile than at the last DDDay!
Bye,
Tobi

[nicolas]

Hi Nicolas,
you forgot to mention that those pauter rods are aluminium rods which require eben more space in the crankcase than the usual chromoly rods! I don´t think that those rods will fit in an magnesium case on a 84mm stroker crank. And I doubt it would be the most reliable combination. I would go with the 78mm crank if you really want to use those rods. I have a 2176ccm in my oval as well and it´s really driveable since it is jetted with the help of a LM-1 and it has enough torque end horsepower to move you sexy fastback a lot faster down the quartermile than at the last DDDay!
Bye,
Tobi

yes indeed these are those beatifull aluminium rods that i got from you. but the caps are pretty thin chromoly and i thought it can pass. i only worry about the cylinderspace and the cam... anyway i will go to the shop today and see if ican testfit it in a case (aluminium one) as i think a mag case is out of the question. and otherwise i have some nice pauter candlestands that i can put on my table 
and yes my sexy fastback needs to go faster...

[Tobi/DFL]

and otherwise i have some nice pauter candlestands that i can put on my table 
and yes my sexy fastback needs to go faster...

Haha, that´s the way I used them before you bought them...

[nicolas]

well i just got back from the shop and it seems that i need to get other rods for the 84 crank. no way i can fit them in a case, not even the alluminium ones he has... bummer. so i guess i am selling some very very very nice pauter rods and a equally impressive DMS 84 mm crank. i hate to see them go but i need the money to get the engine together with the 78 crank and stock rods. i am not too sure about the stock rods, but they are said to work. i haven't been able to find a decent set of H beam rods that i could use on the crank...
anyway i will make a topic out of it for all of you who could be interested in what i am up to...

[richie]

well i just got back from the shop and it seems that i need to get other rods for the 84 crank. no way i can fit them in a case, not even the alluminium ones he has... bummer. so i guess i am selling some very very very nice pauter rods and a equally impressive DMS 84 mm crank. i hate to see them go but i need the money to get the engine together with the 78 crank and stock rods. i am not too sure about the stock rods, but they are said to work. i haven't been able to find a decent set of H beam rods that i could use on the crank...
anyway i will make a topic out of it for all of you who could be interested in what i am up to...

You just need a set of Scat or CB 5/16 h beams and the crank is good,cheers richie,uk

[nicolas]

well i just got back from the shop and it seems that i need to get other rods for the 84 crank. no way i can fit them in a case, not even the alluminium ones he has... bummer. so i guess i am selling some very very very nice pauter rods and a equally impressive DMS 84 mm crank. i hate to see them go but i need the money to get the engine together with the 78 crank and stock rods. i am not too sure about the stock rods, but they are said to work. i haven't been able to find a decent set of H beam rods that i could use on the crank...
anyway i will make a topic out of it for all of you who could be interested in what i am up to...

You just need a set of Scat or CB 5/16 h beams and the crank is good,cheers richie,uk

ok i look into it first as i really like to use the 84... thanks again


oops, just what lenght is good if i have to buy new ones?