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Old 05-28-2012, 06:30 PM   #1
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302 & 5.0 engine help

What's the difference between a 302 engine and a 85 5.0 engine.? Can you tell the differences by just looking at them?
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Old 05-28-2012, 06:32 PM   #2
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Re: 302 & 5.0 engine help

a 302 is a 5.0.... They are just in different measurements. 5.0 means 5 Liters, 302 means 302 cubic inches. Just different ways of looking at it.
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Old 05-28-2012, 06:50 PM   #3
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Just one question are you asking about the difference between a 85 gt 302 and a 85 grand marquis 302?. Because yes i think the cam and heads are different.and or intake aswell
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Old 05-28-2012, 06:56 PM   #4
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There is no difference.. I believe in 85' they had already made them roller motors.. 86' was the first year of fuel injected foxbodies
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Old 05-28-2012, 07:01 PM   #5
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Quote:
Originally Posted by 90GTNovi2000
There is no difference.. I believe in 85' they had already made them roller motors.. 86' was the first year of fuel injected foxbodies
+1 gj see i would have emagined that in the grandmarquis . It would be toned down for better gas mi.
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Old 05-28-2012, 07:19 PM   #6
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The grand marquis had e6 heads I think.. And a. Non roller motor
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Old 05-28-2012, 08:17 PM   #7
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302 engine in a 1969. We're thinking of swapping it for a 5.0 1985 engine.
But I want to know if there's a difference?
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Old 05-28-2012, 08:25 PM   #8
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The 69' is a non roller.. I had a erson solid lift flat tappet motor on my 88' with Windsor heads Keith black 10:1 pistons with lots of work done it went 11.9's on motor 10.9's on a 150 shot.. So the old motors can run also but the newer roller motors can make more power

---------- Post added at 08:25 PM ---------- Previous post was at 08:23 PM ----------

You can tell if the engine is torn down.. But if it is in the car I don't think so..
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Old 05-28-2012, 08:28 PM   #9
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Quote:
Originally Posted by 90GTNovi2000
The 69' is a non roller.. I had a erson solid lift flat tappet motor on my 88' with Windsor heads Keith black 10:1 pistons with lots of work done it went 11.9's on motor 10.9's on a 150 shot.. So the old motors can run also but the newer roller motors can make more power

---------- Post added at 08:25 PM ---------- Previous post was at 08:23 PM ----------

You can tell if the engine is torn down.. But if it is in the car I don't think so..
Is there special markings or anything special to look at in the 85 5.0?
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Old 05-28-2012, 08:30 PM   #10
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If the intake is off a roller motor will have xxx stamped in the block. Otherwise you have to search the casting numbers on the outside of the block near the starter I believe.

---------- Post added at 08:30 PM ---------- Previous post was at 08:30 PM ----------

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If the intake is off a roller motor will have xxx stamped in the lifter valley. Otherwise you have to search the casting numbers on the outside of the block near the starter I believe.
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Old 05-28-2012, 08:47 PM   #11
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Quote:
Originally Posted by dreamstang
If the intake is off a roller motor will have xxx stamped in the block. Otherwise you have to search the casting numbers on the outside of the block near the starter I believe.

---------- Post added at 08:30 PM ---------- Previous post was at 08:30 PM ----------
Okay thank you. I'll go ahead and check that out
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Old 05-28-2012, 08:52 PM   #12
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Slow down I've had a YYY roller block also.. How about if the intake is off pull a lifter and look if it has a roller then there is your answer.. If it is flat well more than likely it's a non roller block.. But I've seen flat tappet cams in roller engines but it will not work vice versa. Because of when they are casted something about the webbing is different I've heard of people modifying the webbing for a roller cam but prob just a waste of time.. I'm buzzing and rambling on lol... Happy Memorial Day all!!!
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Old 05-28-2012, 08:58 PM   #13
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Quote:
Originally Posted by 90GTNovi2000
Slow down I've had a YYY roller block also.. How about if the intake is off pull a lifter and look if it has a roller then there is your answer.. If it is flat well more than likely it's a non roller block.. But I've seen flat tappet cams in roller engines but it will not work vice versa. Because of when they are casted something about the webbing is different I've heard of people modifying the webbing for a roller cam but prob just a waste of time.. I'm buzzing and rambling on lol... Happy Memorial Day all!!!
no you are right. the xxx is the most popular. i forgot about the yyy. but yeah you can tell by the lifter if they are still in there.
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Old 05-28-2012, 09:17 PM   #14
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So those xxx or yyy markings will tell me of its from a 85 5.0?
Because the 302 that we took out had 302 stamped on it
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Old 05-28-2012, 09:19 PM   #15
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No.they won't tell you its an 85 but if its a roller. Which really isn't a big deal which year it is, as long as its a roller.
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