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Old 06-29-2018, 07:22 AM   #1
Ernest72
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Cosworth power blocks

Anyone have them in the tristate area with a AT?

Worth it if I am already at stage 2 catless UEL header? I have no plans of doing FI for this daily driver.

Any thoughts? And yes I read the thread on here which was mostly positive.
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Old 06-29-2018, 09:30 AM   #2
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You mean Crawford? I didn't know Cosworth made power blocks
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Old 06-29-2018, 09:40 AM   #3
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I suggest using Google to search this site.

There are numerous threads you can read here discussing this product. Participate in one of them as opposed to restarting a conversation that's already been had

Give this Google search a go: "site: www.ft86club.com crawford power blocks"
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Old 06-29-2018, 10:17 AM   #4
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Also wanted to know if someone nearby has them, hence my first question and why it’s here in tristate.

And yes Crawford, my bad.
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Old 06-29-2018, 10:49 AM   #5
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Ok - I have a set of Crawford blocks sitting around waiting for install sometime this summer. Might end up being this fall though as I'm going on a long mid July to mid Aug - but if you end up waiting a bit I'll have mine installed eventually. Also have a custom tune with large diameter 4-1 EL headers, so I'll probably end up doing some tweaking with that to optimize the blocks. I also run gas as E85 is too much of a pain to get here in CT (I live in Westport). Will let you know when I get around to putting them on.
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Old 06-29-2018, 11:06 AM   #6
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"I have no plans of doing FI for this daily driver. "






This phrase always triggers me.


If you're looking to get a bit more punch in the lower rpm, since the blocks shift the power band, you should look into doing a 4.88 gearing swap. I recently did it and it peps the car up a lot.
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Old 06-29-2018, 12:59 PM   #7
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Thanks for the responses. I will look into the gearing. Although that is likely more expensive but it sounds like it might be worth it.
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Old 06-29-2018, 02:13 PM   #8
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Thanks for the responses. I will look into the gearing. Although that is likely more expensive but it sounds like it might be worth it.
Do both + good header & custom tune. Probably biggest bang/buck for this car outside of FI.
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Old 06-30-2018, 09:53 AM   #9
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Ok. So after some research on the 4.88 drive I decided against it. Highway gas mileage takes a hit and I have a 78 mile round trip commute and I like my 33mpg. This car really is a daily driver.

Anyone else out there with an opinion on the Crawford blocks?
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Old 06-30-2018, 10:32 AM   #10
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Quote:
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Ok. So after some research on the 4.88 drive I decided against it. Highway gas mileage takes a hit and I have a 78 mile round trip commute and I like my 33mpg. This car really is a daily driver.

Anyone else out there with an opinion on the Crawford blocks?


your MPG is going to suffer from the power blocks as well. Any edit to how the car came out of the factory will lower your MPG.
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Old 06-30-2018, 11:25 AM   #11
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I kinda like mine. Fuel mileage is tune related. On e85 I rarely need to run past 5k rpms.
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Old 06-30-2018, 03:01 PM   #12
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Quote:
Originally Posted by bfrank1972 View Post
Do both + good header & custom tune. Probably biggest bang/buck for this car outside of FI.

It's what I did on my 6MT. Have GruppeS UEL's, Tune and went with 4.56.
The gearing shifts the powerband close to where it should be. I'm happy I did the gearing, if I had to do it again I would probably look at the 4.88. If you want the best bang for the buck (i.e. tight budget), check out the scrap yards for a 2017+ manual, they have the 4.30 gearing.
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Old 07-01-2018, 08:24 AM   #13
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Quote:
Originally Posted by Soloside View Post
your MPG is going to suffer from the power blocks as well. Any edit to how the car came out of the factory will lower your MPG.
I got a stage 1 tune and my mpg jumped a couple. I can pretty easily cruise at 33-35 now and the car's happy spot went from ~72 to 75. I'm wearing down what's left of my winter tires so that's with sticky rubber on warm pavement, I am really curious what it can do with more appropriate shoes but my summer tires are completely worn out so just gonna run these until they're dead too.
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Old 08-23-2018, 03:16 AM   #14
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Quote:
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your MPG is going to suffer from the power blocks as well. Any edit to how the car came out of the factory will lower your MPG.

That hilariously untrue, that's dictated by how your tune handles fueling tables, AFR and load tables. Driving comparatively, I can get the same MPG with the Stage 2 UEL 93 octane tune as with the stock tune with stock UEL. I've made considerable tune edits to my 93 tunes to achieve this without loss of power, of course when I'm flooring it all the time the 93 tune will do worse than flooring it with the stock uels and tune, obviously the trade off for more power.
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