Tall deck 2.5L engine (1988) just arrived.

[Wizard]

This is probably the basis for hybrid DOHC 16 valve.

Have not gotten the DOHC head yet. A guy still have it and slowly cleaning it up before shipping it over to me.

Oh, once again is there round tooth timing belt long enough for tall deck 2.5L with stratus DOHC head?

This is especially for Allmotor, excuse the greasy and all the hack up stuff, it was just pulled.



To confirm this this is really a tall deck engine, ingore the burnt upper timing cover, guy torched the mount off.



Cheers, Wizard

[topdollar69]

The plastic T handle dip stick makes me think its a common block, but the easiest way to tell is if it has a fuel pump block off plate near the waterpump housing on the front of the block.

[Wizard]

Thanks for the heads up.

Yes, it is tall deck 2.5L with fuel pump block off plate. I have to clean off
the grime to get the block #.

Cheers, Wizard

[russ jerome]

The slotted holes on the alt mouinting bracket are another quick ID.
Tall deck will be at the highest point of the slots obviously.

I've given away two of these motors in the last few years, if you
build a screamer your gonna kill me

[cj011]

I have done some digging around myself. You will have to get a spacer made so you can adapt the newer common block crank gear to the older style. That will allow you to follow the common block hybrids directions. The big thing that you need to work out is the timing belt. I am pretty sure you will have to get one custom made.

[topdollar69]

I thought the tall decks used the same crank snout as the common blocks? They sure seem to use the same oil pan configuration.

[Wizard]

The belt is round tooth type so not necessary to do the adapter thing?

Oh, some people had contacted gatorback (goodyear) and found close substitute and installed it with one or two idlers?

Cheers, Wizard

[cj011]

I talked in depth about this with forward motion. The crank snouts are different. Also I was told that they have a different oil pan

[Wizard]

Interesting.

Still, if it was different, then this tall deck engine would have to use different cam & intermediate sprockets even it is round tooth belt but I don't see the problem finding a belt long enough even with idlers to work. Use
home made sprockets using old sprockets with correct centers for the cams of DOHC head.

Anything else I might be missing out?

What are you still saying about the crank sprocket a problem? What's the issue? Wrong position?

Cheers, Wizard

[cj011]

Grant it I am going off the top of my head from a discussion about 6 months ago. I was looking to use the common block cranks just for supply reasons. Wizard, has anyone actually done a tall deck hybrid? If goodyear has, the would kick ass.

[Wizard]

Ohhh! That make sense. That why I wondered because chrysler used same swirl heads for all and cam spockets offsets are same as well.

Then that remains the belt to find, first have to clean up engine, get DOHC head, I'm waiting for it. THEN can mock it up and lay out the belt routings
and stitch old belts together and count # of belt teeth or measure total length.

Cheers, Wizard

[cj011]

I new to custom belts. What does number of teeth and total lenght have to do with anything?

[DblTrbl]

Here is some belt info. Careful, some of these are square teeth and some are not the right pitch

I ended up using the T265 from the voyager. It's slightly wider than the 249. I had a hard time getting the T249 to fit.



Model Teeth Width Length Pitch (Calc) Length

GATES T075 87 1 11/32 32 5/8 0.38 32.63
GATES T272 89 1 33 3/8 0.38 33.38
GATES T181 93 1 34 7/8 0.38 34.88
GATES T182 95 1 35 5/8 0.38 35.63
GATES T067 97 1 36 3/8 0.38 36.38
GATES T194 97 1 36 3/8 0.38 36.38
GATES T283 99 1 37 1/8 0.38 37.13
GATES T212 103 1 38 5/8 0.38 38.63
GATES T264 108 1 40 9/16 0.38 40.56
GATES T134 110 1 41 1/4 0.38 41.25
GATES T245 112 1 5/32 42 0.38 42.00
GATES T284 113 1 42 3/8 0.38 42.38
GATES T096 117 1 43 7/8 0.38 43.88
GATES T152 119 1 44 21/32 0.38 44.66
GATES T083 119 1 44 5/8 0.38 44.63
GATES T171 119 1 44 5/8 0.38 44.63
GATES T232 123 1 5/32 46 1/8 0.38 46.13
GATES T227 124 1 1/32 46 1/2 0.38 46.50
GATES T230 124 1 5/32 46 1/2 0.38 46.50
GATES T184 125 1 1/32 46 29/32 0.38 46.91
GATES T247 126 1 1/32 47 1/4 0.38 47.25
GATES T079 127 1 47 5/8 0.38 47.63
GATES T310 127 1 47 5/8 0.38 47.63
GATES T294 129 1 48 3/8 0.38 48.38
GATES T084 130 1 48 3/4 0.38 48.75
GATES T206 131 1 3/16 49 1/8 0.38 49.13
GATES T258 131 1 49 1/8 0.38 49.13
GATES T249 133 1 49 7/8 0.38 49.88 Have one
GATES T104 133 1 49 7/8 0.38 49.88
GATES T188 133 1 49 7/8 0.38 49.88
GATES T076 134 1 3/16 50 1/4 0.38 50.25
GATES T120 134 1 50 1/4 0.38 50.25
GATES T043 135 1 50 5/8 0.38 50.63
GATES T242 137 1 51 3/8 0.38 51.38
GATES T087 139 1 52 1/8 0.38 52.13
GATES T301 141 1 52 7/8 0.38 52.88
GATES T321 141 1 52 7/8 0.38 52.88
GATES T074 142 1 53 1/4 0.38 53.25
GATES T265 146 1 3/32 54 3/4 0.38 54.75 Have one
GATES T319 146 1 3/32 54 3/4 0.38 54.75
GATES T139 149 1 55 7/8 0.38 55.88
GATES T246 150 1 5/32 56 1/4 0.38 56.25 Have one
GATES T165 151 1 5/32 56 5/8 0.38 56.63
GATES T270 152 1 3/32 57 0.38 57.00
GATES T167 153 1 5/32 57 13/32 0.38 57.41
GATES T256 154 1 5/32 57 3/4 0.38 57.75
GATES T091 163 1 61 1/8 0.38 61.13
GATES T192 169 1 11/32 63 3/8 0.38 63.38
GATES T327 176 1 3/32 66 0.38 66.00
GATES T098 177 1 66 3/8 0.38 66.38
GATES T129 192 1 3/32 72 0.38 72.00
GATES T193 196 1 3/32 73 1/2 0.38 73.50
GATES T279 197 1 73 7/8 0.38 73.88
GATES T196 219 1 81 1/8 0.37 81.13

[Wizard]

DblTrl, What was your set up that you had to use Gates T265 belt?

I'm going with round tooth on tall deck 2.5L hybrid and I still have not gotten DOHC head from the guy.

Is that true that tall deck round tooth pitch is different from common block round tooth pitch?

Cheers, Wizard

[DblTrbl]

My setup uses the 2.4 sprockets at the crank and oli pump. The 2.4 crankshaft sprocket is machined over a 2.2 sprocket and the 2.4 oil pump gear is machined over a 2.5 round gear base. The head uses OBX 2.0 adjustable sprockets. The benefit is that the 2.0/2.4 sprockets are larger, so less chance of stripping the teeth off. The T265 belt is wider so it's stronger. My springs are very heavy (413lb) and the cams are oversized, so there is a lot of force on the belt system.