455 build

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Old Mar 7, 2014 | 05:39 PM
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Talking 455 build

so i bought my cutlass 2.5 years ago and changed little things here and there. the motor since the last owner rebuilt it has only 9800 miles on it, but i want a lot more power from it. i was told that its fully forged bottom end with a after market street/strip cam iron heads and a eld. intake performer. so im keeping the intake the way she is changing the heads to the Mondello heads with their JM 22-55 cam with a .512 int lift and .523 exh lift. got their head gasket recommended to increase compression a little and of course the lifters. the pistons are dish, motor is supposed to be bored .030 but ill find out when i pull the heads. Mondello also recommended the Demon 750 cfm carb that they tune for the set up i have. im hoping to be over 400whp and 500wtq with this set up. The employe from Mondello assured me that i will be over what i wanted but the dyno and strip time will tell. pictures will follow when i start installing everything in 2 weeks
Old Mar 7, 2014 | 05:50 PM
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Look forward to the build.
Old Mar 7, 2014 | 06:24 PM
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Which Mondello heads are you talking about, Bernard or Lynn in Paso Robles?
You'll need more cam than that for 400rwhp. and with a dual plane I'd use an 850, not a 750.

Jmo.
Old Mar 8, 2014 | 05:35 AM
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Originally Posted by cutlassefi
Which Mondello heads are you talking about, Bernard or Lynn in Paso Robles?
You'll need more cam than that for 400rwhp. and with a dual plane I'd use an 850, not a 750.

Jmo.
I was thinking the same question. Same about the carb too.
Old Mar 10, 2014 | 06:47 PM
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http://www.mondellotwister.com/ thats the web site from what I understood was this is the original Mondello and the other web site is not really working that well. as for the 750 they told me that they rework the carb and tune it for the setup i have. I am also tempted at cutting the plenum but not sure if I would benefit from it. i have done some reading but when it comes to building a motor i just know what i want to be at for power and the rest im just listening what the pro's say.
Old Mar 10, 2014 | 06:56 PM
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That's the last place to do business with. Many many better Olds specialists to deal with who won't lie to you or charge you an arm and a leg for something special that isn't.
Old Mar 11, 2014 | 02:19 AM
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Originally Posted by Smitty275
That's the last place to do business with. Many many better Olds specialists to deal with who won't lie to you or charge you an arm and a leg for something special that isn't.

so this shop i guess is not what and who i thought they were and i got taken for?
Old Mar 11, 2014 | 04:03 AM
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Very possible. Just do some searching on that place. You'll find a lot of negative in many forms.
Old Mar 11, 2014 | 04:38 AM
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Originally Posted by PL ENDO
so this shop i guess is not what and who i thought they were and i got taken for?

Go somewhere else, you'll be glad you did.
Old Mar 11, 2014 | 11:24 AM
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its kinda to late i paid for everything and it was all shipped out already. now i guess once i install everything i will see what happens. now since a couple of you that are commenting what should i expect then from this combo?
Old Mar 11, 2014 | 12:11 PM
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Originally Posted by PL ENDO
its kinda to late i paid for everything and it was all shipped out already. now i guess once i install everything i will see what happens. now since a couple of you that are commenting what should i expect then from this combo?
Should run ok. But it won't make the power they're telling you it will.
Old Mar 12, 2014 | 05:50 AM
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I bought a complete motor from them.I went on the reputation the shop once had.I stumbled onto this site after spending my money.There is a lot of negative print about them,but so far I've been lucky as my build has worked out OK. Wait and see how the parts you purchased work,and know there are many guys on this site that really know their sh** will steer you in the right direction and will work with you....Good Luck.

Last edited by drjr56; Mar 12, 2014 at 05:55 AM.
Old Mar 12, 2014 | 09:29 AM
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Originally Posted by drjr56
I bought a complete motor from them.I went on the reputation the shop once had.I stumbled onto this site after spending my money.There is a lot of negative print about them,but so far I've been lucky as my build has worked out OK. Wait and see how the parts you purchased work,and know there are many guys on this site that really know their sh** will steer you in the right direction and will work with you....Good Luck.
yeah i going to do that. if i seen all those reviews before i bought the stuff then i would have not got it. but i had a oldtimer in cali tell me about mondello and that was before i got on this forum i was told they were the #1 guys and that there was not other old performance only shops. i learned to trust this old guy as he showed my my wrong ways with my 69 "numbers matching" firebird that looked like it was nice but great body work done to hide the real problems. but my goal for now is to try to get 400-500 RWHP with more RWTQ but i will be happier with more then i currently have from a dyno saying i only make 283 RWHP and 364 RWTQ
Old Mar 12, 2014 | 10:08 AM
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The old timer probably isn't aware that Mondello's is no longer owned by anyone named Mondello. They just rely on the name to keep selling to people who don't know any better. They are famous for relabeling parts made by others, doubling the price and claiming them as "special". For example, those heads they have for sale with their logo. I would bet my paycheck they are just Pro-Comps with "Mondello" milled in them.
Old Mar 12, 2014 | 07:11 PM
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Mondello of the past and Mondello the man were the Olds people to do business with. Its too bad Mondello of the present falls way short of the reputation they enjoyed. Joe sold the company and unfortantly the new owners have manage to destroy in a short time what Joe spent decades building.

I havent heard anything about their engines or engine building abailities in years. Hopefully it works out.
Old Mar 13, 2014 | 04:15 AM
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I hope I'm as lucky with the 455 as I was with the 400g.But then again Lyn didn't build the 400,a local shop did back in the early 90's.Made 20 or more passes with the 400,not sure I'll make any with the 455 just because of all I've read about these guys.But will see..It's not a bracket car or I'd really be worried. The price was right and I do have a warranty.Not that I was looking for a cheap build.I'm more than willing to pay for quality.

Last edited by drjr56; Mar 13, 2014 at 04:33 AM.
Old Mar 13, 2014 | 01:31 PM
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Originally Posted by chadman
The old timer probably isn't aware that Mondello's is no longer owned by anyone named Mondello. They just rely on the name to keep selling to people who don't know any better. They are famous for relabeling parts made by others, doubling the price and claiming them as "special". For example, those heads they have for sale with their logo. I would bet my paycheck they are just Pro-Comps with "Mondello" milled in them.
if i post up pics of the heads would you be able to tell if they are Pro-Comps???
Old Mar 13, 2014 | 05:30 PM
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Originally Posted by PL ENDO
if i post up pics of the heads would you be able to tell if they are Pro-Comps???

Probably.
Old Mar 15, 2014 | 05:51 PM
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Originally Posted by cutlassefi
Probably.
so here is the pic of the heads and the package i just got today the cam i got today also cam with a cam card.
Attached Images
File Type: jpg
140315_0002.jpg (40.6 KB, 159 views)
File Type: jpg
140315_0003.jpg (69.3 KB, 148 views)
File Type: jpg
140315_0004.jpg (59.4 KB, 147 views)
Old Mar 15, 2014 | 09:10 PM
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Plain old pair of ProComp heads. Can't make out the cam card but at least its an Engle. Repackaged Cometic MLS gasket. Repackaged SCE intake gasket.
Old Mar 16, 2014 | 05:59 AM
  #21  
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Originally Posted by Smitty275
Plain old pair of ProComp heads. Repackaged Cometic MLS gasket. Repackaged SCE intake gasket.

You mean Mondello doesn't make all of the parts they sell?!! Really?!!
Old Mar 16, 2014 | 06:35 AM
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No, but that purple Mondo board they shrink wrap stuff on adds 30-100% to the price.
Old Mar 20, 2014 | 06:13 PM
  #23  
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for the head studs should i get the 12point or hex head? both are 190000psi rated
Old Mar 21, 2014 | 04:29 AM
  #24  
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Personally I hate the 12pt. If a person has a room issue like using a Jesel or T&D rocker system they are a must. Maybe I'm just old fashioned but I like the heavy hex nut for everything else.
Old Mar 21, 2014 | 08:10 PM
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Originally Posted by Smitty275
Personally I hate the 12pt. If a person has a room issue like using a Jesel or T&D rocker system they are a must. Maybe I'm just old fashioned but I like the heavy hex nut for everything else.
good i ordered the hex since they were $50 cheaper.
Old Apr 16, 2014 | 04:58 PM
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so the install has begun and is going good so far
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install 2.jpg (104.3 KB, 83 views)
Old Jan 11, 2020 | 05:27 PM
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1. Measure the main housing bores and make sure they are in spec with no taper
2. TQ up the mains with the bearings installed
3. Measure the bearings with a SUNNEN dial bore and note sizes 1-5
4. Have the crank ground by a competent shop based on your measurments, I give the # 5 main journal an extra .0005 clearance
5. Ck the clearances again after the crank has been ground and CK the run out on the snout, rear main seal journal, and #2 #3#4




Last edited by VORTECPRO; Jan 11, 2020 at 05:31 PM.
Old Jan 14, 2020 | 09:22 AM
  #28  
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I hope after 6 years his project has moved forward...can't say mine has...haha
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